Erster, sehr simpler Player mit buntem Bild funktioniert.

README.md

@@ -2,3 +2,12 @@ SpaceScooter
 ============
 
 This isn't the best game in the world. This is just a tribute.
+
+
+Building with eclipse
+---------------------
+
+There are some minor things you need to set up to your project in eclipse:
+
+* Tell your eclipse to use a new version of java.
+* Add the folder res/ to your *build path*!

src/de/teamteamteam/spacescooter/Main.java

@@ -4,28 +4,35 @@ import java.awt.EventQueue;
 
 import de.teamteamteam.spacescooter.gui.GameFrame;
 import de.teamteamteam.spacescooter.threads.PaintThread;
-import de.teamteamteam.spacescooter.threads.UpdateThread;
+import de.teamteamteam.spacescooter.threads.EntityUpdateThread;
 
+/**
+ * Nothing but a class containing the main method.
+ */
 public class Main {
 
 	/**
-	 * @param args
+	 * Main entry point of the game.
+	 * "... for i am the Alpha and the Omega." - God
+	 * 
+	 * @param args Command line arguments.
 	 */
 	public static void main(String[] args) {
 		final GameFrame gf = new GameFrame();
 		
+		//Initialize the GameFrame properly within the AWT EventQueue
 		EventQueue.invokeLater(new Runnable() {
 			public void run() {
 				gf.init();
 			}
 		});
 		
+		//Initialize PaintThread
 		PaintThread pt = new PaintThread(gf);
 		pt.start();
 
-		UpdateThread ut = new UpdateThread(gf);
-		ut.start();
-
+		//Initialize EntityUpdateThread
+		EntityUpdateThread ut = new EntityUpdateThread(gf);
+		ut.start();	
 	}
-
 }

src/de/teamteamteam/spacescooter/controls/Keyboard.java

@@ -0,0 +1,32 @@
+package de.teamteamteam.spacescooter.controls;
+
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+
+
+public class Keyboard implements KeyListener {
+
+	private static boolean[] keys = new boolean[150]; //TODO: This might kill the game in case there are keycodes > 150
+	
+	public static boolean isKeyDown(int keyCode) {
+		if (keyCode >= 0 && keyCode < keys.length) {
+			return keys[keyCode];
+		}
+		return false;
+	}
+
+	public void keyPressed(KeyEvent e) {
+		keys[e.getKeyCode()] = true;
+	}
+
+	public void keyReleased(KeyEvent e) {
+		keys[e.getKeyCode()] = false;
+	}
+	
+	public void keyTyped(KeyEvent e) {
+		//Nice for cheatcodes and eastereggs later...
+		//System.out.println("keyTyped: " + e);
+	}
+
+
+}

src/de/teamteamteam/spacescooter/entities/Entity.java

@@ -3,13 +3,9 @@ package de.teamteamteam.spacescooter.entities;
 import java.awt.Graphics;
 
 public abstract class Entity {
-	
-	public void update() {
 		
-	}
+	public abstract void update();
 
-	public void paint(Graphics g) {
-		
-	}
+	public abstract void paint(Graphics g);
 	
 }

src/de/teamteamteam/spacescooter/entities/Player.java

@@ -0,0 +1,60 @@
+package de.teamteamteam.spacescooter.entities;
+
+import java.awt.Graphics;
+import java.awt.event.KeyEvent;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import de.teamteamteam.spacescooter.controls.Keyboard;
+
+public class Player extends Entity {
+
+	private int x;
+	private int y;
+	
+	private static BufferedImage img;
+	
+	static {
+		try {
+			InputStream res = Player.class.getClassLoader().getResourceAsStream("images/nyancat.png");
+			if(res == null) {
+				System.out.println("Kein res :/");
+			}
+			img = ImageIO.read(res);
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+	}
+	
+	public Player() {
+		this.x = 200;
+		this.y = 300;
+	}
+	
+	@Override
+	public void update() {
+		if(Keyboard.isKeyDown(KeyEvent.VK_UP)) {
+			this.y--;
+		}
+		if(Keyboard.isKeyDown(KeyEvent.VK_DOWN)) {
+			this.y++;
+		}
+		if(Keyboard.isKeyDown(KeyEvent.VK_LEFT)) {
+			this.x--;
+		}
+		if(Keyboard.isKeyDown(KeyEvent.VK_RIGHT)) {
+			this.x++;
+		}
+
+	}
+
+	@Override
+	public void paint(Graphics g) {
+		g.drawImage(img, this.x, this.y, null);
+	}
+
+}

src/de/teamteamteam/spacescooter/entities/TestEntity.java

@@ -2,8 +2,11 @@ package de.teamteamteam.spacescooter.entities;
 
 import java.awt.Color;
 import java.awt.Graphics;
+import java.awt.event.KeyEvent;
 import java.util.Random;
 
+import de.teamteamteam.spacescooter.controls.Keyboard;
+
 public class TestEntity extends Entity {
 
 	private Color color;
@@ -21,7 +24,9 @@ public class TestEntity extends Entity {
 	}
 
 	public void update() {
-		System.out.println("TestEntity.update()!");
+		if(Keyboard.isKeyDown(KeyEvent.VK_SPACE)) {
+			System.out.println("Hallo Welt!");
+		}
 		this.color = new Color(this.random.nextInt(255),this.random.nextInt(255),this.random.nextInt(255));
 	}
 

src/de/teamteamteam/spacescooter/gui/GameFrame.java

@@ -6,9 +6,14 @@ import java.util.Iterator;
 
 import javax.swing.JFrame;
 
+import de.teamteamteam.spacescooter.controls.Keyboard;
 import de.teamteamteam.spacescooter.entities.Entity;
+import de.teamteamteam.spacescooter.entities.Player;
 import de.teamteamteam.spacescooter.entities.TestEntity;
 
+/**
+ * The game will take place in this beautiful window.
+ */
 public class GameFrame extends JFrame {
 
 	private ArrayList<Entity> entities;
@@ -18,22 +23,32 @@ public class GameFrame extends JFrame {
 		this.entities = new ArrayList<Entity>();
 		
 		//TODO: Remove this!
-		TestEntity t = new TestEntity();
-		this.entities.add(t);
+		this.entities.add(new TestEntity());
+		this.entities.add(new Player());
 	}
 	
 	public ArrayList<Entity> getEntityList() {
 		return this.entities;
 	}
 	
+	/**
+	 * Set up the GameFrame before showing it to the world.
+	 */
 	public void init() {
 		this.setTitle("Unser schöner Titel");
 		this.setSize(800, 600);
 		this.setUndecorated(false);
 		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
+		
+		//Make sure we get the keyboard events. Use Keyboard.isKeyDown() to ask about keys status.
+		this.addKeyListener(new Keyboard());
+		
 		this.setVisible(true);
 	}
 	
+	/**
+	 * Have the GameFrame repaint all the visible entities.
+	 */
 	@Override
 	public void paint(Graphics g) {
 		Iterator<Entity> i = this.entities.iterator();

src/de/teamteamteam/spacescooter/threads/EntityUpdateThread.java

@@ -7,11 +7,15 @@ import java.util.Iterator;
 import de.teamteamteam.spacescooter.entities.Entity;
 import de.teamteamteam.spacescooter.gui.GameFrame;
 
-public class UpdateThread extends Thread {
+/**
+ * This thread is responsible for updating all the entities.
+ * It runs about 60 times per second.
+ */
+public class EntityUpdateThread extends Thread {
 
 	private GameFrame gf;
 
-	public UpdateThread(GameFrame gf) {
+	public EntityUpdateThread(GameFrame gf) {
 		this.gf = gf;
 	}
 
@@ -26,7 +30,7 @@ public class UpdateThread extends Thread {
 		}
 	}
 	
-	public void updateEntities() {
+	private void updateEntities() {
 		ArrayList<Entity> entityList = this.gf.getEntityList();
 		Iterator<Entity> i = entityList.iterator();
 		while(i.hasNext()) {