Space Invaders

The classic game Space Invaders, without GUI.
2020-09-17 20:06:49 +02:00
parent 08097b1ba0
commit 1d271afe24
49 changed files with 3086 additions and 0 deletions
--- a/SpaceInvaders/src/tp/p2/Level.java
+++ b/SpaceInvaders/src/tp/p2/Level.java
@@ -0,0 +1,79 @@
+package tp.p2;
+
+/**
+ * @author Fernando M<>ndez Torrubiano; DNI: 02723009Q
+ * @clase TP1, GRUPO D.
+ *
+ */
+public enum Level {
+	EASY(4, 2, 0.2, 3, 0.5, 1), 
+	HARD(8, 4, 0.3, 2, 0.2, 2),
+	INSANE(12, 4, 0.5, 1, 0.1, 3);
+
+	private int numRegularAliens;
+	private int numDestroyerAliens;
+	private int numCyclesToMoveOneCell;
+	private double ovniFrequency;
+	private double shootFrequency;
+	private int numRowsOfRegularAliens;
+	private double turnExplodeFrequency = 0.05; // actualmente no depende del nivel
+
+	private Level(
+			int numRegularAliens, 
+			int numDestroyerAliens, 
+			double shootFrequency, 
+			int numCyclesToMoveOneCell, 
+			double ovniFrequency, 
+			int numRowsOfRegularAliens)
+	{
+		this.numRegularAliens = numRegularAliens;
+		this.numDestroyerAliens = numDestroyerAliens;
+		this.shootFrequency = shootFrequency;
+		this.numCyclesToMoveOneCell = numCyclesToMoveOneCell;
+		this.ovniFrequency = ovniFrequency;
+		this.numRowsOfRegularAliens = numRowsOfRegularAliens;
+	}
+	
+
+	public int getNumRegularAliens() {
+		return numRegularAliens;
+	}
+	
+	public int getNumDestroyerAliens() {
+		return numDestroyerAliens;
+	}
+
+	public double getShootFrequency() {
+		return shootFrequency;
+	}
+	
+	public int getNumCyclesToMoveOneCell() {
+		return numCyclesToMoveOneCell;
+	}
+
+	public double getOvniFrequency() { 
+		return ovniFrequency;
+	}
+	public int getNumRowsOfRegularAliens() {
+		return numRowsOfRegularAliens;
+	}
+	
+	public int getNumRegularAliensPerRow() {
+		return numRegularAliens / numRowsOfRegularAliens;
+	}
+	
+	public int getNumDestroyerAliensPerRow() {
+		return getNumDestroyerAliens();
+	}
+	
+	public static Level parse(String cadenaEntrada) {
+		for (Level level : Level.values())
+			if (level.name().equalsIgnoreCase(cadenaEntrada))
+				return level;
+	    return EASY;
+	}
+
+	public double getTurnExplodeFrequency(){
+		return turnExplodeFrequency;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/Main.java
+++ b/SpaceInvaders/src/tp/p2/Main.java
@@ -0,0 +1,71 @@
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+package tp.p2;
+
+import java.util.Random;
+import java.util.Scanner;
+import java.lang.NumberFormatException;
+import tp.p2.Level;
+import tp.p2.controller.Controller;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano; DNI: 02723009Q
+ * @clase TP1, GRUPO D.
+ *
+ */
+
+public class Main {
+	
+	public static void main(String[] args) {
+		Game game;
+		Level level = null;
+		Scanner in = null;
+		int seed = 0;
+		Random rnd = null;
+		
+		//Selecci<63>n de nivel:
+		if(args.length >= 1) {
+			level = Level.parse(args[0]);
+		}
+		else {
+			level = Level.EASY;
+		}
+		
+		//Selecci<63>n de semilla:
+		if(args.length == 2) {
+			try {
+				seed = Integer.parseInt(args[1]);
+			}
+			catch (NumberFormatException ex){
+				System.err.format(ex.getMessage() + " %n %n");
+			}
+			finally {
+				rnd = new Random(seed);
+			}
+		}
+		else {
+			rnd = new Random(System.currentTimeMillis());
+		}
+		
+		game = new Game(level, rnd);
+		Controller controlador = new Controller(game, in); 
+		controlador.run(game);
+	}
+	
+}
+
+/*
+//Selecci<63>n de nivel:
+		if(args[0].contentEquals("EASY")) {
+			nivel = Level.EASY;
+		} else if(args[0].contentEquals("HARD")){
+			nivel = Level.HARD;
+		} else if(args[0].contentEquals("INSANE")) {
+			nivel = Level.INSANE;
+		}else {
+			nivel = Level.EASY;
+		}
+*/
--- a/SpaceInvaders/src/tp/p2/controller/Commands/BuySuperMissileCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/BuySuperMissileCommand.java
@@ -0,0 +1,40 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class BuySuperMissileCommand extends Command {
+
+	public BuySuperMissileCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		boolean exe = true;
+		
+		if(!game.buySuperMissile()) {
+			System.err.println("Error, you can't buy a Super Missile right now.");
+			exe = false;
+		}
+		
+		return exe;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("buy") || commandWords[0].equals("b")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/Command.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/Command.java
@@ -0,0 +1,40 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.CommandParseException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class Command {
+	//Atributos:
+	protected final String name;
+	protected final String shortcut;
+	private final String details;
+	private final String help;
+	protected static final String incorrectNumArgsMsg = "Incorrect number of arguments";
+	protected static final String incorrectArgsMSg = "Incorrect argument format";
+	
+	//Constructor:
+	public Command(String name, String shortcut, String details, String help) {
+		this.name = name;
+		this.shortcut = shortcut;
+		this.details = details;
+		this.help = help;
+	}
+	
+	//M<>todos:
+	public abstract boolean execute(Game game) throws CommandExecuteException;
+	public abstract Command parse(String[] commandWords) throws CommandParseException;
+	
+	protected boolean matchCommandName(String name) {
+		return this.shortcut.equalsIgnoreCase(name) || this.name.equalsIgnoreCase(name);
+	}
+	
+	public String helpText() {
+		return this.details + ": " + this.help + "\n";
+	}
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/CommandGenerator.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/CommandGenerator.java
@@ -0,0 +1,63 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandParseException;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class CommandGenerator {
+	//Atributos:
+	private static final int MAXCOMMANDS = 14;
+	private static Command[] avaliableCommands = {
+		new MoveCommand("move", "m", "Move <left|right><1|2>", "Moves UCM-Ship to the indicated direction."),
+		new ShotCommand("shoot", "s", "Shoot", "UCM-Ship launches a missile."),
+		new ShockwaveCommand("shockwave", "w", "ShockWave", "UCM-Ship releases a shock wave."),
+		new ListCommand("list", "l", "List", "Prints the list of available ships."),
+		new ResetCommand("reset", "r", "Reset", "Starts a new game."),
+		new HelpCommand("help", "h", "Help", "Prints this help message."),
+		new ExitCommand("exit", "e", "Exit", "Terminates the program."),
+		new UpdateCommand("none", "", "[none]", "Skips one cycle."),
+		new BuySuperMissileCommand("buy", "b", "Buy", "Buy a Super Missile."),
+		new StringifyCommand("stringify", "sf", "Stringify", "Serialize the board."),
+		new ListPrintersCommand("listPrinters", "lp", "ListPrinters", "Prints the list of available printers."),
+		new SuperShootCommand("supermissile", "sm", "SuperMissile", "UCM-Ship launches a super-missile."),
+		new SaveCommand("save", "g", "Save", "Save the game on a file."),
+		new LoadCommand("load", "c", "Load", "Load the game of a file.")
+	};
+	
+	//M<>todos:
+	
+	//Invoca al m<>todo "parse" de cada subclase de Command.
+	public static Command parseCommand(String[] commandWords) throws CommandParseException {
+		boolean encontrado = false;
+		int i = 0;
+		Command cmd = null;
+		
+		while(!encontrado && i < MAXCOMMANDS) {
+			if(avaliableCommands[i].parse(commandWords) != null) {
+				cmd = avaliableCommands[i];
+				encontrado = true;
+			}
+			else {
+				i++;
+			}
+		}
+		if(cmd == null) { throw new CommandParseException(Command.incorrectArgsMSg); }
+		
+		return cmd;
+	}
+	
+	//Invoca al m<>todo helpText() de cada subclase de Command.
+	//Este m<>todo es invocado por el m<>todo "execute" de la clase HelpCommand.
+	public static String commandHelp(){
+		String help = "";
+		
+		for (int i = 0; i < avaliableCommands.length; i++) {
+			help += avaliableCommands[i].helpText();
+		}
+		
+		return help;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ExitCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ExitCommand.java
@@ -0,0 +1,33 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class ExitCommand extends Command {
+
+	public ExitCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) {
+		game.exit();
+		return true;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("exit") || commandWords[0].equals("e")) {
+			cmd = this;
+		}
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/HelpCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/HelpCommand.java
@@ -0,0 +1,43 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class HelpCommand extends Command {
+
+	public HelpCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		String help = CommandGenerator.commandHelp();
+		
+		if(help != "") {
+			System.out.println(help);
+		}
+		else {
+			throw new CommandExecuteException("No description available.");
+		}
+		
+		return false;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("help") || commandWords[0].equals("h")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ListCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ListCommand.java
@@ -0,0 +1,39 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class ListCommand extends Command {
+
+	public ListCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) {
+		System.out.println(
+				"[R]egular ship: Points: 5 - Harm: 0 - Shield: 2 \n" +
+				"[D]estroyer ship: Points: 10 - Harm: 1 - Shield: 1 \n" +
+				"[E]xplosive destroyer ship: Points: 10 - Harm: 1 - Shield: 1 \n" +		
+				"[O]vni: Points: 25 - Harm: 0 - Shield: 1 \n" +
+				"^__^: Harm: 1 - Shield: 3\n");
+		return false;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("list") || commandWords[0].equals("l")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ListPrintersCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ListPrintersCommand.java
@@ -0,0 +1,39 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+import tp.p2.game.PrinterTypes;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class ListPrintersCommand extends Command {
+
+	public ListPrintersCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		System.out.println(PrinterTypes.printerHelp(game));
+		if(PrinterTypes.printerHelp(game) == "") {
+			throw new CommandExecuteException("No printers avaliable.");
+		}
+		return false;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("listPrinters") || commandWords[0].equals("lp")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/LoadCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/LoadCommand.java
@@ -0,0 +1,99 @@
+package tp.p2.controller.Commands;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.util.Scanner;
+import tp.p2.Level;
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.CommandParseException;
+import tp.p2.controller.Exceptions.FileContentsException;
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+import tp.p2.game.GameObjects.AlienShip;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class LoadCommand extends Command {
+	private Scanner in;
+
+	public LoadCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		this.in = new Scanner(System.in);
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		BufferedReader inStream = null;
+		FileContentsVerifier verifier = new FileContentsVerifier();
+		String gameString = "";
+		int restCycles = 0;
+		
+		System.out.println("File name > ");
+		String fileName = in.nextLine() + ".dat";
+		
+		try {
+			inStream = new BufferedReader(
+						new InputStreamReader(
+							new FileInputStream(fileName), "UTF-8"));
+			try {
+				//Read from the archive until we find the game line:
+				do {
+					gameString = inStream.readLine().trim();
+				} while(!verifier.verifyGameString(gameString));
+				String[] words = gameString.split(FileContentsVerifier.separator1);
+				restCycles = Integer.parseInt(words[1]);
+				
+				//Read the level:
+				String levelString = inStream.readLine().trim();
+				verifier.verifyLevelString(levelString);
+				Level level = Level.parse(levelString);
+				
+				//Load the game information:
+				game.load(inStream);
+				AlienShip.setNumAliens(level.getNumRegularAliens()+level.getNumDestroyerAliens());
+				game = new Game(level, restCycles);
+				System.out.println("Game successfully loaded from file " + fileName + "\n");
+			}
+			catch (FileContentsException e) {
+				e.printStackTrace();
+			} 
+			catch (IOException e) {
+				e.printStackTrace();
+			}
+			finally { 
+				try {
+					inStream.close();
+				} 
+				catch (IOException e) {
+					e.printStackTrace();
+				}  
+			}
+		}
+		catch (FileNotFoundException e) {	
+			e.printStackTrace();
+		}
+		catch (UnsupportedEncodingException e) {
+			e.printStackTrace();
+		}
+		return true;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) throws CommandParseException {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("load") || commandWords[0].equals("c")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/MoveCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/MoveCommand.java
@@ -0,0 +1,59 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.CommandParseException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class MoveCommand extends Command{
+	//Atributos:
+	private String moveDir;
+	private int nCasillas;
+	
+	//Constructor:
+	public MoveCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+	}
+
+	//M<>todos:
+	public boolean execute(Game game) throws CommandExecuteException{
+		boolean exe = false;
+	
+		if(game.move(this.moveDir, this.nCasillas)) {
+			exe = true;
+		}
+		
+		return exe;
+	}
+
+	public Command parse(String[] commandWords) throws CommandParseException { 
+		Command cmd = null;
+		
+		if(commandWords.length > 3) {
+			throw new CommandParseException(Command.incorrectNumArgsMsg);
+		}
+		if(commandWords[0].equals("move") || commandWords[0].equals("m")) {
+			cmd = this;
+			if(commandWords[1].equals("left") || commandWords[1].equals("right")) {
+				this.moveDir = commandWords[1];
+				if(Integer.parseInt(commandWords[2]) > 0 && Integer.parseInt(commandWords[2]) <= 2) {
+					this.nCasillas = Integer.parseInt(commandWords[2]);
+				}
+				else {
+					throw new CommandParseException("The number of cells is not correct.");
+				}
+			}
+			else {
+				throw new CommandParseException("Error reading the direction.");
+			}
+		}
+		
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ResetCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ResetCommand.java
@@ -0,0 +1,33 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class ResetCommand extends Command {
+
+	public ResetCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) {
+		game.reset();
+		return true;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("reset") || commandWords[0].equals("r")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/SaveCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/SaveCommand.java
@@ -0,0 +1,63 @@
+package tp.p2.controller.Commands;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.Scanner;
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.CommandParseException;
+import tp.p2.game.Game;
+import tp.p2.game.GamePrinter;
+import tp.p2.game.Stringifier;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class SaveCommand extends Command {
+	
+	private Scanner in;
+	
+	public SaveCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		this.in = new Scanner(System.in);
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		GamePrinter printer = new Stringifier();
+		
+		System.out.println("File name > ");
+		String fileName = in.nextLine() + ".dat";
+		
+		BufferedWriter outChars = null;         
+		
+		try {
+			outChars = new BufferedWriter(new FileWriter(fileName));
+			outChars.write(printer.toString(game));
+			outChars.close();
+		} 
+		catch (IOException e) {
+			e.printStackTrace();
+		} 
+		finally {
+			if(outChars == null) { throw new CommandExecuteException("No se pudo guardar el juego."); }
+			else { System.out.println("Game successfully saved in file " + fileName + ". Use the 'load' command to reload it.\n"); }
+		}
+	
+		return false;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) throws CommandParseException {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("save") || commandWords[0].equals("g")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
+
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ShockwaveCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ShockwaveCommand.java
@@ -0,0 +1,39 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class ShockwaveCommand extends Command {
+	//Atributos:
+
+	public ShockwaveCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+	}
+
+	public boolean execute(Game game) throws CommandExecuteException {
+		boolean exe = true;
+		
+		if(!game.shockWave()) {
+			exe = false;
+			throw new CommandExecuteException("El ShockWave no est<73> disponible.");
+		}
+		
+		return exe;
+	}
+
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("shockwave") || commandWords[0].equals("w")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/ShotCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/ShotCommand.java
@@ -0,0 +1,41 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class ShotCommand extends Command {
+	//Atributos:
+	
+	//Constructor:
+	public ShotCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+	}
+	
+	//M<>todos:
+	public boolean execute(Game game) throws CommandExecuteException {
+		boolean exe = true;
+	
+		if(!game.shootLaser()) {
+			exe = false;
+			throw new CommandExecuteException("You can't launch two missiles at once.");
+		}
+		
+		return exe;
+	}
+
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("shot") || commandWords[0].equals("s")) {
+			//cmd = new ShotCommand(commandWords[0], "m", "Realiza un disparo", null);
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/StringifyCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/StringifyCommand.java
@@ -0,0 +1,47 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Commands.Command;
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+import tp.p2.game.GamePrinter;
+import tp.p2.game.Stringifier;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class StringifyCommand extends Command{
+
+	public StringifyCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) throws CommandExecuteException {
+		GamePrinter printer = new Stringifier();
+		
+		if(printer != null) {
+			System.out.println(printer.toString(game));
+		}
+		/*
+		else {
+			throw new CommandExecuteException("The board could not be serializable.");
+		}*/
+		
+		return false;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if (commandWords[0].equals("stringify") || commandWords[0].equals("sf")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+	
+}
--- a/SpaceInvaders/src/tp/p2/controller/Commands/SuperShootCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/SuperShootCommand.java
@@ -0,0 +1,41 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class SuperShootCommand extends Command {
+
+	public SuperShootCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+	}
+
+	public boolean execute(Game game) throws CommandExecuteException {
+		boolean exe = true;
+	
+		if(!game.shootSuperLaser()) {
+			exe = false;
+			throw new CommandExecuteException("You don't have super-missiles.");
+		}
+		
+		return exe;
+	}
+
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("supermissile") || commandWords[0].equals("sm")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
+
+
+
--- a/SpaceInvaders/src/tp/p2/controller/Commands/UpdateCommand.java
+++ b/SpaceInvaders/src/tp/p2/controller/Commands/UpdateCommand.java
@@ -0,0 +1,31 @@
+package tp.p2.controller.Commands;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class UpdateCommand extends Command {
+	public UpdateCommand(String name, String shortcut, String details, String help) {
+		super(name, shortcut, details, help);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public boolean execute(Game game) {
+		return true;
+	}
+
+	@Override
+	public Command parse(String[] commandWords) {
+		Command cmd = null;
+		
+		if(commandWords[0].equals("none") || commandWords[0].equals("n") || commandWords[0].equals("")) {
+			cmd = this;
+		}
+		
+		return cmd;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Controller.java
+++ b/SpaceInvaders/src/tp/p2/controller/Controller.java
@@ -0,0 +1,97 @@
+/**
+ * 
+ */
+package tp.p2.controller;
+
+import java.util.Scanner;
+import tp.p2.controller.Commands.Command;
+import tp.p2.controller.Commands.CommandGenerator;
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.CommandParseException;
+import tp.p2.game.BoardPrinter;
+import tp.p2.game.Game;
+import tp.p2.game.GamePrinter;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class Controller {	
+	//Atributos: 
+	Scanner in;
+	
+	//Constructor:
+	public Controller(Game game, Scanner in) {
+		this.in = new Scanner(System.in);
+	}
+	
+	//M<>todos:
+	
+	//Ejecuta el bucle del juego hasta que termina:
+	public void run(Game game) {
+		GamePrinter printer = new BoardPrinter(Game.MAXFIL, Game.MAXCOL);
+		System.out.println(game + printer.toString(game));
+		
+		do {
+			System.out.println("Command > ");
+			String[] words = in.nextLine().toLowerCase().trim().split("\\s+");
+			
+			try {
+				Command command = CommandGenerator.parseCommand(words);
+				if (command != null) {
+					if (command.execute(game)) {
+						game.update();
+						System.out.println(game + printer.toString(game));
+					}
+				}
+				else {
+					System.out.format("Command " + words[0] + " not found. \n");
+				}
+			}
+			catch (CommandParseException | CommandExecuteException ex) {
+				System.out.format(ex.getMessage() + " %n %n");
+			}
+		} while (!game.isFinished());
+		game.update();
+		System.out.println(game + printer.toString(game));
+		System.out.println(game.getWinnerMessage());
+	}
+	
+}
+
+//TPpr2v2:
+/*
+public class Controller {	
+//Atributos: 
+Scanner in;
+
+//Constructor:
+public Controller(Game game, Scanner in) {
+	this.in = new Scanner(System.in);
+}
+
+//M<>todos:
+
+//Ejecuta el bucle del juego hasta que termina:
+public void run(Game game) {
+	System.out.println(game);
+	do {
+		System.out.println("Command > ");
+		String[] words = in.nextLine().toLowerCase().trim().split("\\s+");
+		
+		Command command = CommandGenerator.parseCommand(words);
+		if (command != null) {
+			if (command.execute(game)) {
+				game.update();
+				System.out.println(game);
+			}
+		}
+		else {
+			System.out.format("Command " + words[0] + " not found. \n");
+		}
+	} while (!game.isFinished());
+}
+
+}
+*/
--- a/SpaceInvaders/src/tp/p2/controller/Exceptions/CommandExecuteException.java
+++ b/SpaceInvaders/src/tp/p2/controller/Exceptions/CommandExecuteException.java
@@ -0,0 +1,21 @@
+package tp.p2.controller.Exceptions;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class CommandExecuteException extends Exception {
+
+	private static final long serialVersionUID = 1L;
+	
+	private String message;
+	
+	public CommandExecuteException(String string) {
+		this.message = "Failed to run command.\n" 
+				+ "Cause of exception: \n"
+				+ this + ": " + string;
+	}
+	
+	public String getMessage() {
+		return this.message;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/controller/Exceptions/CommandParseException.java
+++ b/SpaceInvaders/src/tp/p2/controller/Exceptions/CommandParseException.java
@@ -0,0 +1,22 @@
+package tp.p2.controller.Exceptions;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class CommandParseException extends Exception {
+
+	private static final long serialVersionUID = 1L;
+	
+	private String message;
+	
+	public CommandParseException(String string) {
+		this.message = "Command can<61>t be parse.\n"
+					+ "Cause of exception: \n"
+					+ this + ": " + string;
+	}
+	
+	public String getMessage() {
+		return this.message;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/controller/Exceptions/FileContentsException.java
+++ b/SpaceInvaders/src/tp/p2/controller/Exceptions/FileContentsException.java
@@ -0,0 +1,24 @@
+package tp.p2.controller.Exceptions;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class FileContentsException extends Exception {
+	public static final String wrongPrefixMsg = "unknown game attribute: ";
+	public static final String lineTooLongMsg = "too many words on line commencing: ";
+	public static final String lineTooShortMsg = "missing data on line commencing: ";
+
+	private static final long serialVersionUID = 1L;
+	
+	private String string;
+	
+	public FileContentsException(String string) {
+		this.string = "Contend not found.\n"
+				+ "Cause of exception: \n"
+				+ this + ": " + string;
+	}
+	
+	public String toString() {
+		return this.string;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/game/BoardPrinter.java
+++ b/SpaceInvaders/src/tp/p2/game/BoardPrinter.java
@@ -0,0 +1,76 @@
+package tp.p2.game;
+
+import tp.p2.util.MyStringUtils;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class BoardPrinter implements GamePrinter {
+	private int numRows; 
+	private int numCols;
+	private String[][] board;
+	private final String space = " ";
+	
+	public BoardPrinter(int maxfil, int maxcol) {
+		this.numRows = maxfil;
+		this.numCols = maxcol;
+	}
+
+	@Override
+	public String toString(Game game) {
+		encodeGame(game);
+		
+		int cellSize = 7;
+		int marginSize = 2;
+		String vDelimiter = "|";
+		String hDelimiter = "-";
+		
+		String rowDelimiter = MyStringUtils.repeat(hDelimiter, (numCols * (cellSize + 1)) - 1); 
+		String margin = MyStringUtils.repeat(space, marginSize);
+		String lineDelimiter = String.format("%n%s%s%n", margin + space, rowDelimiter);
+		
+		StringBuilder str = new StringBuilder();
+		
+		str.append(lineDelimiter);
+		
+		for(int i=0; i<numRows; i++) {
+			str.append(margin).append(vDelimiter);
+			for (int j=0; j<numCols; j++) {
+				str.append(MyStringUtils.centre(board[i][j], cellSize)).append(vDelimiter);
+			}
+			str.append(lineDelimiter);
+		}
+		return str.toString();
+	}
+	
+	private void encodeGame(Game game) {
+		this.board = new String[numRows][numCols];
+		for(int i = 0; i < numRows; i++) {
+			for(int j = 0; j < numCols; j++) {
+				board[i][j] =  game.board.toString(i, j);
+			}
+		}
+	}
+	
+	@Override
+	public GamePrinter parse(String name) {
+		GamePrinter tablero = null;
+		
+		if(name.equals("boardprinter") || name.equals("board")) {
+			tablero = this;
+		}
+		
+		return tablero;
+	}
+
+	@Override
+	public String helpText() {
+		return "prints the game formatted as a board of dimension: " + Game.MAXFIL + "," + Game.MAXCOL;
+	}
+
+	@Override
+	public void setGame(Game game) {
+		//
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/FileContentsVerifier.java
+++ b/SpaceInvaders/src/tp/p2/game/FileContentsVerifier.java
@@ -0,0 +1,224 @@
+package tp.p2.game;
+
+import tp.p2.Level;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class FileContentsVerifier{
+	
+	public static final String separator1 = ";";
+	public static final String separator2 = ",";
+	public static final String labelRefSeparator = " - ";
+
+	private String foundInFileString = "";
+	
+	private void appendToFoundInFileString(String linePrefix) {
+		foundInFileString += linePrefix;
+	}
+
+	// Don't catch NumberFormatException.
+	public boolean verifyCycleString(String cycleString) {
+		String[] words = cycleString.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 2
+				|| !verifyCurrentCycle(Integer.parseInt(words[1])))
+			return false;
+		return true;
+	}
+	
+	public boolean verifyLevelString(String levelString) {
+		String[] words = levelString.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 2
+				|| !verifyLevel(Level.parse(words[1])))
+			return false;
+		return true;
+	}
+	
+	// Don't catch NumberFormatException.
+	public boolean verifyOvniString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 3) return false;
+		String[] coords = words[1].split(separator2);
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour) ) 
+			return false;
+		return true;
+	}
+
+	// Don't catch NumberFormatException.
+	public boolean verifyPlayerString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 6) return false;
+
+		String[] coords = words[1].split(separator2);
+		
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour)
+				|| !verifyPoints(Integer.parseInt(words[3]))
+				|| !verifyBool(words[4]) )
+			return false;
+		return true;
+	}
+	
+	// Don't catch NumberFormatException.
+	/*
+	public boolean verifyAlienShipString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 5) return false;
+
+		String[] coords = words[1].split(separator2);
+		
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour)
+				|| !verifyCycleToNextAlienMove(Integer.parseInt(words[3]), game.getLevel())
+				|| !verifyDir(words[4]) ) {
+			return false;
+		}
+		return true;
+	}
+	*/
+	
+	//DestroyerAlien
+	public boolean verifyDestroyerShipString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 5) return false;
+		
+		if(!words[0].equals("D")) return false;
+		
+		String[] coords = words[1].split(separator2);
+		
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour)
+				|| !verifyCycleToNextAlienMove(Integer.parseInt(words[3]), game.getLevel())
+				|| !verifyDir(words[4]) ) {
+			return false;
+		}
+		return true;
+	}
+	
+	//RegularAlien
+	public boolean verifyRegularShipString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 5) return false;
+		
+		if(!words[0].equals("R")) return false;
+		
+		String[] coords = words[1].split(separator2);
+		
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour)
+				|| !verifyCycleToNextAlienMove(Integer.parseInt(words[3]), game.getLevel())
+				|| !verifyDir(words[4]) ) {
+			return false;
+		}
+		return true;
+	}
+	
+	//ExplosiveAlien
+	public boolean verifyExplosiveShipString(String lineFromFile, Game game, int armour) {
+		String[] words = lineFromFile.split(separator1);
+		appendToFoundInFileString(words[0]);
+		if (words.length != 5) return false;
+		
+		if(!words[0].equals("E")) return false;
+		
+		String[] coords = words[1].split(separator2);
+		
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game)
+				|| !verifyLives(Integer.parseInt(words[2]), armour)
+				|| !verifyCycleToNextAlienMove(Integer.parseInt(words[3]), game.getLevel())
+				|| !verifyDir(words[4]) ) {
+			return false;
+		}
+		return true;
+	}
+	
+	// Don't catch NumberFormatException.
+	public boolean verifyWeaponString(String lineFromFile, Game game) {
+		String[] words = lineFromFile.split(separator1);
+		if (words.length != 2) return false;
+		
+		appendToFoundInFileString(words[0]);
+		String[] coords = words[1].split(separator2);
+
+		if ( !verifyCoords(Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), game) )
+			return false;
+		return true;
+	}
+	
+	public boolean verifyRefString(String lineFromFile) {
+		String[] words = lineFromFile.split(labelRefSeparator);
+		if (words.length != 2 || !verifyLabel(words[1])) return false;
+		return true;
+	}
+
+	public static boolean verifyLabel(String label) {
+		return Integer.parseInt(label) > 0;
+	}
+	
+	public static boolean verifyCoords(int x, int y, Game game) {
+		return game.isOnBoard(x, y);
+	}
+	
+	public static boolean verifyCurrentCycle(int currentCycle) {
+		return currentCycle >= 0;
+	}
+	
+	public static boolean verifyLevel(Level level) {
+		return level != null;
+	}
+	
+	public static boolean verifyDir(String dir) {
+		return dir != null;
+	}
+	
+	public static boolean verifyLives(int live, int armour) {
+		return 0 < live && live <= armour;
+	}
+	
+	public static boolean verifyPoints(int points) {
+		return points >= 0;
+	}
+	
+	public static boolean verifyCycleToNextAlienMove(int cycle, Level level) {
+		return 0 <= cycle && cycle <= level.getNumCyclesToMoveOneCell();
+	}
+	
+	// parseBoolean converts any string different from "true" to false.
+	public static boolean verifyBool(String boolString) {
+		return boolString.equals("true") || boolString.equals("false");
+	}
+
+	public boolean isMissileOnLoadedBoard() {
+		return foundInFileString.toUpperCase().contains("M");
+	}
+	
+	// Use a regular expression to verify the string of concatenated prefixes found
+	public boolean verifyLines() {
+		// TO DO: compare foundInFileString with a regular expression
+		return true; 
+	}
+
+	// text explaining allowed concatenated prefixes
+	public String toString() {
+		// TO DO
+		return "";
+	}
+
+	public boolean verifyGameString(String gameString) {
+		String[] words = gameString.split(";");
+		appendToFoundInFileString(words[0]);
+		if (words.length != 2)
+			return false;
+		return true;
+	}
+}
+
--- a/SpaceInvaders/src/tp/p2/game/Game.java
+++ b/SpaceInvaders/src/tp/p2/game/Game.java
@@ -0,0 +1,265 @@
+package tp.p2.game;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.util.Random;
+import tp.p2.Level;
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.controller.Exceptions.FileContentsException;
+import tp.p2.game.GameObjects.BoardInitializer;
+import tp.p2.game.GameObjects.GameObject;
+import tp.p2.game.GameObjects.Ovni;
+import tp.p2.game.GameObjects.AlienShip;
+import tp.p2.game.GameObjects.Shockwave;
+import tp.p2.game.GameObjects.SuperMissile;
+import tp.p2.game.GameObjects.UCMMissile;
+import tp.p2.game.GameObjects.UCMShip;
+import tp.p2.game.GameObjects.Interfaces.IPlayerController;
+import tp.p2.game.GameObjects.Lists.GameObjectBoard;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class Game implements IPlayerController{
+	//Constantes:
+	public final static int MAXFIL = 9;
+	public final static int MAXCOL = 8;
+	public final static int DAMAGE = 1;
+	public final static int COSTSUPERMISSILE = 20;
+	
+	//Atributos
+	private int currentCycle;
+	private Random rand;
+	private Level level;
+	private int restCycles;
+
+	GameObjectBoard board;
+
+	private UCMShip player;
+	
+	private boolean doExit;
+	private BoardInitializer initializer;
+	
+	//Constructor:
+	public Game (Level level, Random random){
+		this.rand = random;
+		this.level = level;
+		this.restCycles = this.level.getNumCyclesToMoveOneCell();
+		initializer = new BoardInitializer();
+		initGame();
+	}
+	
+	public Game (Level level, int restCycles){
+		this.rand = new Random(System.currentTimeMillis());
+		this.level = level;
+		this.restCycles = restCycles;
+		this.currentCycle = restCycles;
+		initializer = null;
+	}
+	
+	//M<>todos:
+	public void initGame () {
+		currentCycle = 0;
+		board = initializer.initialize(this, level);
+		player = new UCMShip(this, MAXFIL - 1, MAXCOL / 2);
+		board.add(player);
+	}
+
+	public Random getRandom() {
+		return rand;
+	}
+	
+	public Level getLevel() {
+		return level;
+	}
+	
+	public int getCurrentCycle() {
+		return this.currentCycle;
+	}
+	
+	public void reset() {
+		initGame();
+	}
+	
+	public void addObject(GameObject object) {
+		board.add(object);
+	}
+	
+	public String positionToString(int fila, int columna) {
+		return board.toString(fila, columna);
+	}
+	
+	public boolean isFinished() {
+		return playerWin() || aliensWin() || doExit;
+	}
+	
+	public boolean aliensWin() {
+		return !player.isAlive() || AlienShip.haveLanded();
+	}
+	
+	private boolean playerWin () {
+		return AlienShip.allDead();
+	}
+	
+	public void update() {
+		board.computerAction();
+		board.update();
+		currentCycle += 1;
+		if(this.restCycles == 0) {
+			this.restCycles = this.level.getNumCyclesToMoveOneCell();
+		}
+		else {
+			restCycles--;
+		}
+	}
+	
+	public boolean isOnBoard(int fila, int columna) {
+		return MAXFIL > fila && MAXCOL > columna;
+	}
+	
+	public void exit() {
+		doExit = true;
+	}
+	
+	public String infoToString() {
+		return "Life: " + this.player.getLive() + "\n" 
+				+ "Number of cycles: " + this.currentCycle + "\n"
+				+ "Points: " + this.player.getPoints() + "\n"
+				+ "Remaining aliens: " + AlienShip.numAliens() + "\n" 
+				+ "ShockWave: " + this.player.getShockWave() + "\n"
+				+ "Number of SuperMissiles: " + this.player.getNumSuperMissiles() + "\n";
+	}
+	
+	public String toString() {
+		//BoardPrinter gp = new BoardPrinter(MAXFIL, MAXCOL);	
+		//String tablero = this.infoToString() + gp.toString(this);
+		//return tablero;
+		
+		return this.infoToString();
+	}
+	
+	public String serialize() {
+		return "--SPACE INVADERS v2.0--\n\n"
+				+ "G;" + this.restCycles + "\n"
+				+ "L;" + this.level + "\n"
+				+ this.board.serialize() + "\n";			
+	}
+	
+	public String getWinnerMessage () {
+		if (playerWin()) return "Player win!";
+		else if (aliensWin()) return "Aliens win!";
+		else if (doExit) return "Player exits the game";
+		else return "This should not happen";
+	}
+	
+	@Override
+	public boolean move(String dir, int numCells) throws CommandExecuteException{
+		boolean move = false;
+
+		if(this.player.move(dir, numCells)) {
+			move = true;
+		}
+		
+		return move;
+	}
+
+	@Override
+	public boolean shootLaser() {
+		boolean shoot = false;
+		
+		if(this.player.getMisile()) {
+			this.enableMissile();
+			shoot = true;
+		}
+		return shoot;
+	}
+
+	@Override
+	public boolean shockWave() {
+		boolean sw = false;
+		
+		if(this.player.getShockWave()) {
+			sw = true;
+			this.board.swAttack();
+			this.player.deleteSW();
+			GameObject ovni = new Ovni(this, 0, Game.MAXCOL, 1);
+			this.board.add(ovni);
+		}
+		
+		return sw;
+	}
+	
+	@Override
+	public boolean shootSuperLaser() {
+		boolean shoot = false;
+		
+		if(this.player.getSuperMisile() || this.player.getMisile()) {
+			this.enableSuperMissile();
+			shoot = true;
+		}
+		
+		return shoot;
+	}
+
+	@Override
+	public void receivePoints(int points) {
+		this.player.addPoints(points);
+	}
+
+	@Override
+	public void enableShockWave() {
+		Shockwave sw = new Shockwave(this, this.player.getFila(), this.player.getColumna(), 1);
+		this.player.activeSW(sw);
+		this.board.add(sw);
+	}
+
+	@Override
+	public void enableMissile() {
+		UCMMissile misil = new UCMMissile(this, this.player.getFila(), this.player.getColumna(), 1);
+		this.player.activeMisile(misil);
+		this.board.add(misil);
+	}
+	
+	@Override
+	public void enableSuperMissile() {
+		SuperMissile misil = new SuperMissile(this, this.player.getFila(), this.player.getColumna(), 1);
+		this.player.activeSuperMisile(misil);
+		this.board.add(misil);
+	}
+
+	public boolean buySuperMissile() throws CommandExecuteException {
+		boolean buy = false;
+		
+		if (this.player.getPoints() >= COSTSUPERMISSILE) {
+			this.player.subtractPoints(COSTSUPERMISSILE);
+			this.player.getSuperMissile();
+			buy = true;
+		}
+		if(!buy) {
+			throw new CommandExecuteException("You don't have enough points.");
+		}
+		
+		return buy;
+	}
+
+	public int getRestCycles() {
+		return this.restCycles;
+	}
+	
+	public void load(BufferedReader inStream) throws IOException, FileContentsException {
+		this.board.setCurrentObjects(0);
+		String line = inStream.readLine().trim();
+		while (line != null && !line.isEmpty()) {
+			FileContentsVerifier verifier = new FileContentsVerifier();
+			GameObject gameObject = GameObjectGenerator.parse(line, this, verifier);
+			if(gameObject == null) {
+				throw new FileContentsException("invalid file, unrecognised line prefix");
+			}
+			board.add(gameObject);
+			line = inStream.readLine().trim();
+		}
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjectGenerator.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjectGenerator.java
@@ -0,0 +1,46 @@
+package tp.p2.game;
+
+import java.util.Random;
+import tp.p2.Level;
+import tp.p2.controller.Exceptions.FileContentsException;
+import tp.p2.game.GameObjects.Bomb;
+import tp.p2.game.GameObjects.DestroyerAlien;
+import tp.p2.game.GameObjects.GameObject;
+import tp.p2.game.GameObjects.Ovni;
+import tp.p2.game.GameObjects.RegularAlien;
+import tp.p2.game.GameObjects.Shockwave;
+import tp.p2.game.GameObjects.SuperMissile;
+import tp.p2.game.GameObjects.UCMMissile;
+import tp.p2.game.GameObjects.UCMShip;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class GameObjectGenerator {
+    private static Game otherGame = new Game(Level.EASY, new Random(System.currentTimeMillis()));
+    private static GameObject[] availableGameObjects = { 
+	    new UCMShip(otherGame, 0, 0), 
+	    new Ovni(otherGame, 0, 0, 0), 
+	    new RegularAlien(otherGame, 0, 0, 0), 
+	    new DestroyerAlien(otherGame, 0, 0, 0), 
+	    new Shockwave(otherGame, 0, 0, 0), 
+	    new Bomb(otherGame, 0, 0, 0), 
+	    new UCMMissile(otherGame, 0, 0, 0), 
+	    new SuperMissile(otherGame, 0, 0, 0) 
+	};
+
+
+	public static GameObject parse(String stringFromFile, Game game, FileContentsVerifier verifier) throws FileContentsException { 
+		GameObject gameObject = null; 
+		for (GameObject go: availableGameObjects) { 
+			gameObject = go.parse(stringFromFile, game, verifier); 
+			if (gameObject != null) break; 
+			} 
+		return gameObject; 
+	} 
+}
+
+/*
+
+*/
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/AlienShip.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/AlienShip.java
@@ -0,0 +1,130 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class AlienShip extends EnemyShip {
+	//Atributos est<73>ticos:
+	protected static boolean down = false; //Variable est<73>tica booleana para indicar si los Aliens tienen que bajar o no.
+	protected static String direction = "left"; //Variable est<73>tica que indica la direcci<63>n en la que se mueve los aliens.
+	protected static boolean isLanded = false;
+	protected static boolean allDead = false;
+	protected static int numAliens = 0; //Variable est<73>tica que indica el n<>mero de Aliens que hay en el tablero actualmente.
+	protected static int contAliens = 0; //Variable est<73>tica que ind<6E>ca (si down == true), cu<63>ntos aliens han bajado.
+	
+	
+	//Constructor:
+	public AlienShip(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+	}
+
+	//M<>todos:
+	public static boolean haveLanded() {
+		return isLanded;
+	}
+
+	public static boolean allDead() {
+		return allDead;
+	}
+	
+	public static int numAliens() {
+		return numAliens;
+	}
+	
+	public static void setNumAliens(int aliens) {
+		numAliens = aliens;
+	}
+	
+	public void move() {
+		if(this.game.getRestCycles() == 0) {
+			if(direction == "left") {
+				this.columna--;
+				if(this.columna == 0) {
+					down = true;
+				}
+			}
+			else if(direction == "right") {
+				this.columna++;
+				if(this.columna == Game.MAXCOL-1) {
+					down = true;
+				}
+			}
+		}
+		if(down && this.game.getRestCycles() == this.level.getNumCyclesToMoveOneCell()) {	
+			this.fila++;
+			if(this.fila == Game.MAXFIL-1) { isLanded = true; }
+			contAliens++;
+			if(contAliens >= numAliens) {
+				contAliens = 0;
+				down = false;
+				if(direction == "left") {
+					direction = "right";
+				}
+				else {
+					direction = "left";
+				}
+			}
+		}
+	}
+	
+	public boolean receiveMissileAttack(int damage) {
+		this.getDamage(damage);
+		return true;
+	}
+	
+	public boolean receiveShockWaveAttack(int damage) {
+		this.getDamage(damage);
+		return true;
+	}
+	
+	public boolean recibeExplodeAttack(int damage) { //Para recibir da<64>o de una nave explosiva.
+		this.getDamage(damage);
+		return true;
+	}	
+	
+	public abstract void computerAction();
+	public abstract void onDelete();
+	public abstract String toString();
+}
+
+
+
+/*
+public void move() {
+		if(this.game.getCurrentCycle() % this.level.getNumCyclesToMoveOneCell() == 0) {
+			if(direction == "left") {
+				this.columna--;
+				if(this.columna == 0) {
+					down = true;
+				}
+			}
+			else if(direction == "right") {
+				this.columna++;
+				if(this.columna == Game.MAXCOL-1) {
+					down = true;
+				}
+			}
+		}
+		if(down == true && this.game.getCurrentCycle() % this.level.getNumCyclesToMoveOneCell() != 0) {	
+			this.fila++;
+			if(this.fila == Game.MAXFIL-1) { isLanded = true; }
+			contAliens++;
+			if(contAliens == numAliens) {
+				contAliens = 0;
+				down = false;
+				if(direction == "left") {
+					direction = "right";
+				}
+				else {
+					direction = "left";
+				}
+			}
+		}
+	}
+*/
+
+
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/BoardInitializer.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/BoardInitializer.java
@@ -0,0 +1,61 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.Level;
+import tp.p2.game.Game;
+import tp.p2.game.GameObjects.Lists.GameObjectBoard;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class BoardInitializer {
+	
+	private Level level;
+	private GameObjectBoard board;
+	private Game game;
+	
+	public GameObjectBoard initialize(Game game, Level level) {
+		this.level = level;
+		this.game = game;
+		board = new GameObjectBoard(Game.MAXFIL, Game.MAXCOL);
+		
+		initializeOvni();
+		initializeRegularAliens();
+		initializeDestroyerAliens();
+		return board;
+	}
+	
+	private void initializeOvni () {
+		GameObject ovni = new Ovni(game, 0, Game.MAXCOL, 1);
+		board.add(ovni);
+	}
+
+	private void initializeRegularAliens () {
+		int fila=2, col=3;
+		for (int i = 0; i < this.level.getNumRowsOfRegularAliens(); i++) {
+			for (int j = 0; j < this.level.getNumRegularAliensPerRow(); j++) {
+				GameObject regular = new RegularAlien(this.game, fila, col, 2);
+				board.add(regular);
+				col++;
+			}
+			fila++;
+			col = 3;
+		}
+	}
+	
+	private void initializeDestroyerAliens() {
+		int fila, col;
+		switch (level) {
+			case EASY: fila = 3; col = 4; break;
+			case HARD: fila = 4; col = 3; break;
+			default: fila = 5; col = 3; break;
+		}
+		for (int i = 0; i < this.level.getNumDestroyerAliensPerRow(); i++) {
+			GameObject destroyer = new DestroyerAlien(this.game, fila, col, 1);
+			board.add(destroyer);
+			col++;
+		}
+	}
+}
+
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Bomb.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Bomb.java
@@ -0,0 +1,74 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class Bomb extends Weapon{
+	//Atributos:
+	private String letra;
+	
+	//Constructor:
+	public Bomb(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.letra = "oo";
+	}
+	
+	public Bomb() {
+		super(null, 0, 0, 0);
+		this.letra = "oo";
+	}
+
+	public void weaponAttack(GameObject other) {
+		other.receiveBombAttack(Game.DAMAGE);
+		//this.live--;
+		this.getDamage(Game.DAMAGE);
+	}
+	
+	public boolean recibeMissileAttack(int damage) {
+		//this.live--;
+		this.getDamage(damage);
+		return true;
+	}
+
+	@Override
+	public void computerAction() {}
+
+	@Override
+	public void onDelete() {
+		if(this.getLive() <= 0 || this.getFila() > Game.MAXFIL-1) { //
+			this.isAlive = false;
+		}
+	}
+
+	@Override
+	public void move() {
+		this.fila++;
+	}
+
+	@Override
+	public String toString() {
+		return this.letra;
+	}
+
+	@Override
+	public String serializer() {
+		return "B;"
+				+ this.fila + ","
+				+ this.columna + ","
+				+ this.live;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyWeaponString(stringFromFile, game2) ? 
+				new Bomb(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+	}
+	
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/DestroyerAlien.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/DestroyerAlien.java
@@ -0,0 +1,86 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+import tp.p2.game.GameObjects.Interfaces.IExecuteRandomActions;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class DestroyerAlien extends AlienShip implements IExecuteRandomActions{
+	//Atributos:
+	private Bomb bomb;
+	private String letra;
+	
+	//Constructor:
+	public DestroyerAlien(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.bomb = null;
+		this.letra = "D";
+		numAliens++;
+	}
+	
+	public DestroyerAlien() {
+		super(null, 0, 0, 1);
+		this.bomb = null;
+		this.letra = "D";
+		numAliens++;
+	}
+
+	//M<>todos:
+	public void deleteBomb() {
+		this.bomb = null;
+	}
+	
+	public boolean getBomb() {
+		return this.bomb != null ? true : false;
+	}
+
+	@Override
+	public void computerAction() {
+		if(this.bomb == null && IExecuteRandomActions.canGenerateRandomBomb(game)) {
+			this.bomb = new Bomb(game, this.fila, this.columna, 1);
+			this.game.addObject(this.bomb);
+		}
+	}
+
+	@Override
+	public void onDelete() {
+		if(this.bomb != null && !this.bomb.isAlive) {
+			this.deleteBomb();
+		}
+		if(this.live <= 0) {
+			this.isAlive = false;
+			numAliens--;
+			this.game.receivePoints(10);
+			if(numAliens == 0) { allDead = true; }
+		}
+	}
+	
+	@Override
+	public String toString() {
+		return this.letra + "[" + this.live + "]";
+	}
+
+	@Override
+	public String serializer() {
+		return "D;"
+				+ this.fila + ","
+				+ this.columna + ";"
+				+ this.live + ";"
+				//+ this.getBomb() + ";"
+				+ this.game.getRestCycles() + ";"
+				+ this.direction;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyDestroyerShipString(stringFromFile, game2, 2) ? 
+				new DestroyerAlien(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/EnemyShip.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/EnemyShip.java
@@ -0,0 +1,23 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class EnemyShip extends Ship {
+	
+	//Constructor:
+	public EnemyShip(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		// TODO Auto-generated constructor stub
+	}
+	
+	//M<>todos:
+	public abstract void computerAction();
+	public abstract void onDelete();
+	public abstract void move();
+	public abstract String toString();
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/GameObject.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/GameObject.java
@@ -0,0 +1,73 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.Level;
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+import tp.p2.game.GameObjects.Interfaces.IAttack;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class GameObject implements IAttack {
+	//Atributos est<73>ticos:
+	protected int fila, columna;
+	protected int live;
+	protected boolean isAlive;
+	protected Game game;
+	protected Level level;
+	
+	//Constrcutor:
+	public GameObject(Game game, int fila, int col, /*Coordenadas iniciales*/ int live) {
+		this.fila = fila;
+		this.columna = col;
+		this.game = game;
+		this.level = this.game.getLevel();
+		this.live = live;
+		this.isAlive = true;
+	}
+	
+	//M<>todos:
+	public int getFila() {
+		return this.fila;
+	}
+
+	public int getColumna() {
+		return this.columna;
+	}
+
+	public boolean isAlive() {
+		return this.isAlive;
+	}
+
+	public int getLive() {
+		return this.live;
+	}
+	
+	public boolean isOnPosition(int x, int y) {
+		return this.fila == x && this.columna == y;
+	}
+
+	public void getDamage (int damage) {
+		this.live = damage >= this.live ? 0 : this.live - damage;
+	}
+	
+	public boolean isOut() {
+		return !game.isOnBoard(this.fila, this.columna);
+	}
+	
+	public void update() {
+		this.move();
+		if(this.isAlive != false) { this.onDelete(); }
+	}
+
+	public abstract void computerAction();
+	public abstract void onDelete();
+	public abstract void move();
+	public abstract String toString();
+	public abstract String serializer();
+	public abstract GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier);
+
+}
+
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IAttack.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IAttack.java
@@ -0,0 +1,16 @@
+package tp.p2.game.GameObjects.Interfaces;
+
+import tp.p2.game.GameObjects.GameObject;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public interface IAttack {
+	default boolean performAttack(GameObject other) {return false;};
+
+	default boolean receiveMissileAttack(int damage) {return false;};
+	default boolean receiveBombAttack(int damage) {return false;};
+	default boolean receiveShockWaveAttack(int damage) {return false;};
+	default boolean recibeExplodeAttack(int damage) {return false;};
+}
+
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IExecuteRandomActions.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IExecuteRandomActions.java
@@ -0,0 +1,18 @@
+package tp.p2.game.GameObjects.Interfaces;
+
+import tp.p2.game.Game;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public interface IExecuteRandomActions {
+	
+	static boolean canGenerateRandomOvni(Game game){
+		return game.getRandom().nextDouble() < game.getLevel().getOvniFrequency();
+	}
+	
+	static boolean canGenerateRandomBomb(Game game){
+		return game.getRandom().nextDouble() < game.getLevel().getShootFrequency();	
+	}
+	
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IPlayerController.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Interfaces/IPlayerController.java
@@ -0,0 +1,20 @@
+package tp.p2.game.GameObjects.Interfaces;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public interface IPlayerController {
+		// PLAYER ACTIONS	
+		public boolean move (String dir, int numCells) throws CommandExecuteException;
+		public boolean shootLaser();
+		public boolean shockWave();
+		public boolean shootSuperLaser();
+		
+		// CALLBACKS
+		public void receivePoints(int points);
+		public void enableShockWave();
+		public void enableMissile();
+		public void enableSuperMissile();
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Lists/GameObjectBoard.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Lists/GameObjectBoard.java
@@ -0,0 +1,129 @@
+package tp.p2.game.GameObjects.Lists;
+
+import tp.p2.game.Game;
+//import tp.p2.game.Game;
+import tp.p2.game.GameObjects.GameObject;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class GameObjectBoard {
+	//Atributos:
+	private GameObject[] objects;
+	private int currentObjects;
+	
+	//Constructor:
+	public GameObjectBoard (int width, int height) {
+		this.objects = new GameObject[width * height];
+		this.currentObjects = 0;
+	}
+	
+	//M<>todos:
+	private int getCurrentObjects() {
+		return this.currentObjects;
+	}
+	
+	public void setCurrentObjects(int currentObjects) {
+		this.currentObjects = currentObjects;
+	}
+	
+	public void add (GameObject object) {
+		this.objects[this.currentObjects] = object;
+		this.currentObjects++;
+	}
+	
+	/*
+	private GameObject getObjectInPosition(int fila, int columna) {
+		int pos = getIndex(fila, columna);
+		return this.objects[pos];
+	}
+	*/
+	
+	private int getIndex(int fila, int columna) {
+		boolean encontrado = false;
+		int i = this.getCurrentObjects()-1;
+		
+		while(!encontrado && i >= 0) {
+			if(this.objects[i].getFila() == fila && this.objects[i].getColumna() == columna) {
+				encontrado = true;
+			}
+			else {
+				i--;
+			}
+		}
+		
+		return i;
+	}
+
+	private void remove(GameObject object) {
+		int pos = getIndex(object.getFila(), object.getColumna());
+		
+		this.objects[pos] = null;
+		for (int i = pos; i < this.getCurrentObjects(); i++) {
+			this.objects[i] = this.objects[i+1];
+		}
+		this.currentObjects--;
+	}
+	
+	public void update() {
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			this.objects[i].update();
+			this.checkAttacks(this.objects[i]);
+		}
+		this.removeDead();
+	}
+	
+	private void checkAttacks(GameObject object) {
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			if (object != this.objects[i]) {
+				if(object.performAttack(this.objects[i])) {
+					object.onDelete();
+					this.objects[i].onDelete();
+				}
+			}
+		}
+	}
+	
+	public void computerAction() {
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			this.objects[i].computerAction();
+		}
+	}
+	
+	private void removeDead() {
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			if(!this.objects[i].isAlive()) {
+				remove(this.objects[i]);
+			}
+		}
+	}
+	
+	public void swAttack() {
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			this.objects[i].receiveShockWaveAttack(Game.DAMAGE);
+		}
+	}
+
+	public String toString(int fila, int columna) {
+		String print = "";
+		
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			if(this.objects[i].getFila() == fila && this.objects[i].getColumna() == columna) {
+				print += this.objects[i].toString();
+			}
+		}
+		
+		return print;
+	}
+
+	public String serialize() {
+		String serialize = "";
+		
+		for (int i = 0; i < this.getCurrentObjects(); i++) {
+			serialize += this.objects[i].serializer() + "\n";
+		}
+		
+		return serialize;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Ovni.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Ovni.java
@@ -0,0 +1,88 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+import tp.p2.game.GameObjects.Interfaces.IExecuteRandomActions;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class Ovni extends EnemyShip{
+	//Atributos:
+	private String letra;
+	private boolean enabble;
+	
+	//Constructor:
+	public Ovni(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.letra = "O";
+		this.enabble = false;
+	}
+	
+	public Ovni() {
+		super(null, 0, 0, 1);
+		this.letra = "O";
+		this.enabble = false;
+	}
+
+	//M<>todos:
+	public String toString() {
+		return this.letra + "[" + this.live + "]";
+	}
+
+	@Override
+	public void computerAction() {
+		if(IExecuteRandomActions.canGenerateRandomOvni(game)) {
+			this.enabble = true;
+		}
+	}
+	
+	public boolean receiveMissileAttack(int damage) {
+		this.live -= damage;
+		this.game.enableShockWave();
+		this.game.receivePoints(25);
+		return true;
+	}
+	
+	public boolean receiveShockWaveAttack(int damage) {
+		this.live -= damage;
+		return true;
+	}
+
+	@Override
+	public void onDelete() {
+		if(this.columna < 0) {
+			this.enabble = false;
+			this.columna = Game.MAXCOL;
+		}
+		else if(this.live <= 0) {
+			this.isAlive = false;
+		}
+	}
+
+	@Override
+	public void move() {
+		if(this.enabble) { //QUITAR LA CONDICI<43>N DE LA COLUMNA, ES S<>LO PARA PRUEBAS. && this.columna >= Game.MAXCOL
+			this.columna--;
+		}
+	}
+
+	@Override
+	public String serializer() {
+		return "O;"
+				+ this.fila + ","
+				+ this.columna + ";"
+				+ this.live;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyOvniString(stringFromFile, game2, 1) ? 
+				new Ovni(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/RegularAlien.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/RegularAlien.java
@@ -0,0 +1,115 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class RegularAlien extends AlienShip {
+	//Atributos:
+	private String letra;
+	private boolean explosive;
+	
+	//Constructor:
+	public RegularAlien(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.letra = "C";
+		this.explosive = false;
+		numAliens++;
+	}
+	
+	public RegularAlien() {
+		super(null, 0, 0, 2);
+		this.letra = "C";
+		this.explosive = false;
+		numAliens++;
+	}
+	
+	public RegularAlien(Game game, int fila, int col, int live, String letra) {
+		super(game, fila, col, live);
+		this.letra = letra;
+		this.explosive = false;
+		numAliens++;
+	}
+
+	public int getLive() {
+		return this.live;
+	}
+	
+	public boolean isDead() {
+		return this.getLive() > 0;
+	}
+
+	@Override
+	public void computerAction() {
+		if((!this.explosive) && (this.game.getRandom().nextDouble() < this.level.getTurnExplodeFrequency())) {
+			this.explosive = true;
+			this.letra = "E";
+		}
+	}
+
+	@Override
+	public void onDelete() {
+		if(this.live == 0) {
+			if(!this.explosive) { this.isAlive = false; }
+				numAliens--;
+				if(numAliens == 0) { allDead = true; }
+			
+			this.game.receivePoints(5);
+		}
+	}
+
+	@Override
+	public String toString() {
+		return this.letra + "[" + this.live + "]";
+	}
+	
+	@Override
+	public String serializer() {
+		String letra = "R";
+		if(explosive) {letra = this.letra;}
+		return letra + ";"
+				+ this.fila + ","
+				+ this.columna + ";"
+				+ this.live + ";"
+				+ this.game.getRestCycles() + ";"
+				+ this.direction;
+	}
+	
+	//M<>todos si la nave es explosiva:
+	public void explodeAttack(GameObject other) {
+		other.recibeExplodeAttack(Game.DAMAGE);
+	}
+	
+	public boolean performAttack(GameObject other) {
+		boolean attack = false;
+		
+		if(this.explosive && this.live == 0) {
+			if(other.isAlive()) {
+				if(other.isOnPosition(fila-1, columna) || other.isOnPosition(fila+1, columna) || other.isOnPosition(fila, columna-1) || other.isOnPosition(fila, columna+1)) { 
+					this.explodeAttack(other); //restar vida
+					attack = true;
+				}
+			}
+			this.isAlive = false;
+		}
+		
+		return attack;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		if(words[0].equals("R")) {
+			return verifier.verifyRegularShipString(stringFromFile, game2, 2) ? 
+						new RegularAlien(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+		}
+		else {
+			return verifier.verifyExplosiveShipString(stringFromFile, game2, 2) ? 
+					new RegularAlien(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2]), words[0]):null;
+		}
+	}
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Ship.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Ship.java
@@ -0,0 +1,22 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class Ship extends GameObject {
+	
+	//Constructor:
+	public Ship(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+	}
+	
+	//M<>todos:
+	public abstract void computerAction();
+	public abstract void onDelete();
+	public abstract void move();
+	public abstract String toString();
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Shockwave.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Shockwave.java
@@ -0,0 +1,55 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class Shockwave extends Weapon {
+	
+	public Shockwave(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+	}
+	
+	public Shockwave() {
+		super(null, 0, 0, 1);
+	}
+
+	@Override
+	protected void weaponAttack(GameObject other) {
+		other.receiveShockWaveAttack(Game.DAMAGE);
+		this.getDamage(Game.DAMAGE);
+	}
+	
+	@Override
+	public void computerAction() {}
+
+	@Override
+	public void onDelete() { 
+		if(this.live == 0) { 
+			this.isAlive = false; 
+		}
+	}
+
+	@Override
+	public void move() {}
+
+	@Override
+	public String toString() {
+		return "";
+	}
+
+	@Override
+	public String serializer() {
+		return "";
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		return verifier.verifyWeaponString(stringFromFile, game2) ? new Shockwave(game2, 0, 0, 1):null;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/SuperMissile.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/SuperMissile.java
@@ -0,0 +1,69 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class SuperMissile extends Weapon {
+	//Atributos:
+	private String letra;
+	
+	//Constructor:
+	public SuperMissile(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.letra = "||";
+	}
+	
+	public SuperMissile() {
+		super(null, 0, 0, 1);
+		this.letra = "||";
+	}
+
+	//M<>todos:
+	@Override
+	protected void weaponAttack(GameObject other) {
+		other.receiveMissileAttack(Game.DAMAGE*2);
+		this.getDamage(Game.DAMAGE);
+	}
+
+	@Override
+	public void computerAction() {}
+
+	@Override
+	public void onDelete() {
+		if(this.live <= 0 || this.fila < 0) {
+			this.isAlive = false;
+		}
+	}
+
+	@Override
+	public void move() {
+		this.fila--;
+		
+	}
+
+	@Override
+	public String toString() {
+		return this.letra;
+	}
+
+	@Override
+	public String serializer() {
+		return "M;"
+				+ this.fila + ","
+				+ this.columna;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyWeaponString(stringFromFile, game2) ? 
+				new SuperMissile(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+	}
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/UCMMissile.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/UCMMissile.java
@@ -0,0 +1,67 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.FileContentsVerifier;
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class UCMMissile extends Weapon{
+	//Atributos:
+	private String letra;
+	
+	//Constructor:
+	public UCMMissile(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		this.letra = "|";
+	}
+	
+	public UCMMissile() {
+		super(null, 0, 0, 1);
+		this.letra = "|";
+	}
+
+	@Override
+	protected void weaponAttack(GameObject other) {
+		other.receiveMissileAttack(Game.DAMAGE);
+		//this.live--;
+		this.getDamage(Game.DAMAGE);
+	}
+	
+	@Override
+	public void computerAction() {}
+
+	@Override
+	public void onDelete() {
+		if(this.live <= 0 || this.fila < 0) {
+			this.isAlive = false;
+		}
+	}
+
+	@Override
+	public void move() {
+		this.fila--;
+	}
+
+	@Override
+	public String toString() {
+		return this.letra;
+	}
+
+	@Override
+	public String serializer() {
+		return "M;"
+				+ this.fila + ","
+				+ this.columna;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyWeaponString(stringFromFile, game2) ? 
+				new UCMMissile(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1]), Integer.parseInt(words[2])):null;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/UCMShip.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/UCMShip.java
@@ -0,0 +1,186 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+import tp.p2.game.FileContentsVerifier;
+//import tp.p2.controller.ShockwaveCommand;
+import tp.p2.game.Game;
+//import tp.p2.util.MyStringUtils;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class UCMShip extends Ship {
+	//Atributos:
+	private Weapon misil;
+	private Shockwave shockwave;
+	private String letra;
+	private int points;
+	private int numSuperMissiles;
+	
+	//Constructor:
+	public UCMShip(Game game, int fila, int col) {
+		super(game, fila, col, 3);
+		this.misil = null;
+		this.shockwave = null;
+		this.letra = "^__^";
+		this.points = 0;
+		this.numSuperMissiles = 0;
+	}
+
+	public UCMShip() {
+		super(null, Game.MAXFIL-1, 4, 3);
+		this.misil = null;
+		this.shockwave = null;
+		this.letra = "^__^";
+		this.points = 0;
+		this.numSuperMissiles = 0;
+	}
+
+	public void activeMisile(UCMMissile misil) {
+		this.misil = misil;
+	}
+	
+	public void activeSW(Shockwave sw) {
+		this.shockwave = sw;
+	}
+	
+	public void activeSuperMisile(SuperMissile supermisil) {
+		if(this.numSuperMissiles > 0) { this.misil = supermisil; }
+	}
+	
+	public void deleteMisil() {
+		if(this.getSuperMisile()) { this.numSuperMissiles--; }
+		this.misil = null;
+	}
+	
+	public void deleteSW() {
+		this.shockwave = null;
+	}
+	
+	public boolean receiveBombAttack(int damage) {
+		this.live -= damage;
+		return true;
+	}
+
+	@Override
+	public void computerAction() {}
+
+	@Override
+	public void onDelete() {
+		if((this.misil != null) && (!this.misil.isAlive)) { //(this.misil.getLive() == 0 || this.misil.getFila() < 0)
+			this.deleteMisil();
+		}
+		
+		if(this.live <= 0) {
+			this.isAlive = false;
+		}
+	}
+	public boolean move(String dir, int nCasillas) throws CommandExecuteException{
+		boolean move = false;
+		
+		switch(dir) {
+			case "right":
+				if(this.columna + nCasillas < Game.MAXCOL) {
+					switch(nCasillas) {
+						case 1: this.columna++; move = true; break;
+						case 2: this.columna += 2; move = true; break;
+						default: break;
+					}
+				}
+			break;
+			case "left":
+				if(this.columna - nCasillas >= 0) {
+					switch(nCasillas) {
+						case 1: this.columna--; move = true; break;
+						case 2: this.columna -= 2; move = true; break;
+						default: this.columna += 0; move = false; break;
+					}
+				}
+			break;
+		}
+		if(!move) {
+			throw new CommandExecuteException("You'd come out of the limits of the board.");
+		}
+		
+		return move;
+	}
+	
+	public void addPoints(int points) {
+		this.points += points;
+	}
+	
+	public void subtractPoints(int points) {
+		this.points -= points;
+	}
+	
+	public int getPoints() {
+		return this.points;
+	}
+	
+	public boolean getMisile() {
+		boolean misilEnable = false;
+		
+		if(this.misil == null) {
+			misilEnable = true;
+		}
+		
+		return misilEnable;
+	}
+	
+	public boolean getShockWave() {
+		boolean sw = false;
+		
+		if(this.shockwave != null) {
+			sw = true;
+		}
+		
+		return sw;
+	}
+	
+	public boolean getSuperMisile() {
+		boolean smEnable = false;
+		
+		if(this.numSuperMissiles > 0) {
+			smEnable = true;
+		}
+		
+		return smEnable;
+	}
+	
+	public void getSuperMissile() {
+		this.numSuperMissiles++;
+	}
+	
+	public int getNumSuperMissiles() {
+		return this.numSuperMissiles;
+	}
+	
+	@Override
+	public void move() {}
+
+	@Override
+	public String toString() {
+		return this.letra /*+ "[" + this.live + "]"*/;
+	}
+
+	@Override
+	public String serializer() {
+		return "P;" 
+				+ this.fila + "," 
+				+ this.columna + ";" 
+				+ this.live + ";" 
+				+ this.points +  ";"
+				+ this.getShockWave() + ";"
+				+ this.numSuperMissiles;
+	}
+
+	@Override
+	public GameObject parse(String stringFromFile, Game game2, FileContentsVerifier verifier) {
+		String[] words = stringFromFile.split(FileContentsVerifier.separator1);
+		String[] coords = words[1].split(FileContentsVerifier.separator2);
+		return verifier.verifyPlayerString(stringFromFile, game2, 3) ? 
+				new UCMShip(game2, Integer.parseInt(coords[0]), Integer.parseInt(coords[1])):null;
+	}
+}
--- a/SpaceInvaders/src/tp/p2/game/GameObjects/Weapon.java
+++ b/SpaceInvaders/src/tp/p2/game/GameObjects/Weapon.java
@@ -0,0 +1,36 @@
+package tp.p2.game.GameObjects;
+
+import tp.p2.game.Game;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public abstract class Weapon extends GameObject {
+
+	public Weapon(Game game, int fila, int col, int live) {
+		super(game, fila, col, live);
+		// TODO Auto-generated constructor stub
+	}
+	
+	public boolean performAttack(GameObject other) {
+		boolean attack = false;
+		
+		if(isAlive() && other.isAlive()) {
+			if(other.isOnPosition(this.fila, this.columna)) { //x, y de weapon
+				this.weaponAttack(other); //restar vida
+				attack = true;
+			}
+		}
+		
+		return attack;
+	}
+	
+	protected abstract void weaponAttack(GameObject other);
+	public abstract void computerAction();
+	public abstract void onDelete();
+	public abstract void move();
+	public abstract String toString();
+
+}
--- a/SpaceInvaders/src/tp/p2/game/GamePrinter.java
+++ b/SpaceInvaders/src/tp/p2/game/GamePrinter.java
@@ -0,0 +1,11 @@
+package tp.p2.game;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public interface GamePrinter {
+	String toString(Game game);
+	public GamePrinter parse(String name);
+	public String helpText();
+	void setGame(Game game); //A<>adido en la versi<73>n 3.
+}
--- a/SpaceInvaders/src/tp/p2/game/PrinterGenerator.java
+++ b/SpaceInvaders/src/tp/p2/game/PrinterGenerator.java
@@ -0,0 +1,29 @@
+package tp.p2.game;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class PrinterGenerator {
+	private static GamePrinter[] availablePrinters = {
+		new BoardPrinter(Game.MAXFIL, Game.MAXCOL),
+		new Stringifier(),
+	};
+
+	public static GamePrinter parse(String name) {		
+		GamePrinter printer = null;
+		for (GamePrinter p: availablePrinters) {
+			printer = p.parse(name);
+			if (printer != null) break;
+		}
+		return printer;
+	}
+		
+	public static String printerHelp() {
+		StringBuilder printers = new StringBuilder();	
+		for (GamePrinter p: availablePrinters)
+			printers.append(p.helpText());
+		return printers.toString();
+	}
+
+}
+
--- a/SpaceInvaders/src/tp/p2/game/PrinterTypes.java
+++ b/SpaceInvaders/src/tp/p2/game/PrinterTypes.java
@@ -0,0 +1,45 @@
+package tp.p2.game;
+
+import tp.p2.controller.Exceptions.CommandExecuteException;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public enum PrinterTypes {
+	
+	BOARDPRINTER("boardprinter",
+			"prints the game formatted as a board of dimension: ",
+			new BoardPrinter(Game.MAXFIL, Game.MAXCOL)),
+	STRINGIFIER("stringifier",
+			"prints the game as plain text",
+			new Stringifier());
+	
+	private String printerName;
+	private String helpText;
+	private GamePrinter printerObject;
+	
+	private PrinterTypes(String name, String text, GamePrinter printer) {
+		printerName = name;
+		helpText = text;
+		printerObject = printer;
+	}
+	
+	public static String printerHelp(Game game) throws CommandExecuteException {
+		String helpString = "";
+		for (PrinterTypes printer : PrinterTypes.values())
+			helpString += String.format("%s : %s%s%n", printer.printerName, printer.helpText,
+				(printer == BOARDPRINTER ? Game.MAXFIL + " x " + Game.MAXCOL : "") );
+		
+		if(helpString == "") {throw new CommandExecuteException("No hay tableros disponibles.");}
+		return helpString;
+	}
+	
+	// Assumes a max of one object of each printer type is needed (otherwise return copy)
+	public GamePrinter getObject(Game game) {
+		printerObject.setGame(game);
+		return printerObject;
+	}
+
+
+}
+
--- a/SpaceInvaders/src/tp/p2/game/Stringifier.java
+++ b/SpaceInvaders/src/tp/p2/game/Stringifier.java
@@ -0,0 +1,34 @@
+package tp.p2.game;
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+public class Stringifier implements GamePrinter{
+
+	@Override
+	public String toString(Game game) {
+		return game.serialize();
+	}
+
+	@Override
+	public GamePrinter parse(String name) {
+		GamePrinter tablero = null;
+		
+		if(name.equals("serializer") || name.equals("stringifier")) {
+			tablero = this;
+		}
+		
+		return tablero;
+	}
+
+	@Override
+	public String helpText() {
+		return "prints the game as plain text";
+	}
+
+	@Override
+	public void setGame(Game game) {
+		// TODO Auto-generated method stub
+		
+	}
+}
--- a/SpaceInvaders/src/tp/p2/util/MyStringUtils.java
+++ b/SpaceInvaders/src/tp/p2/util/MyStringUtils.java
@@ -0,0 +1,24 @@
+package tp.p2.util;
+
+/**
+ * @author Fernando M<>ndez Torrubiano
+ *
+ */
+
+public class MyStringUtils {
+	public static String repeat(String elmnt, int length) {
+		String result = "";
+		for (int i = 0; i < length; i++) {
+			result += elmnt;
+		}
+	return result;
+	}
+	
+	public static String centre(String text, int len){
+		String out = String.format(" %"+len+"s %s %"+len+"s", "",text,"");
+		float mid = (out.length()/2);
+		float start = mid - (len/2);
+		float end = start + len;
+		return out.substring((int)start, (int)end);
+	}
+}