README.md

@@ -2,7 +2,7 @@
 My advanced Hello World program is a version of the old game Snake.
 
 ## Features
-- normal playing experience of Snake but hardware-accelerated
+- normal playing experience of Snake
 - 5 different fruits that can be eaten to enlarge the Snake
 - theoretically Start- and Endscreen, currently mostly unused
 - theoretically visual display whether a result is good or bad, commented out for now as it does not appear to work as expected
@@ -23,4 +23,4 @@ My advanced Hello World program is a version of the old game Snake.
   - as the name suggests, defines the visual appearance before and after games 
   
 ## JAR of the final version
-If you follow <a href="https://github.com/delvh/Snake/releases">**this link**</a> and click on release "Snake - Rattlesnake version", you can download the runnable JAR of how the project currently looks like.
+If you follow <a href="https://github.com/delvh/Snake/releases">**this link**</a> and click on release "Snake - almost finished", you can download the runnable JAR of how the completed project should look like. Unfortunately due to poor Version-Control-skills, the original code got lost and had to be rewritten, however it should resemble the executed code closely

src/main/dev/lh/Food.java

@@ -1,54 +0,0 @@
-package dev.lh;
-
-import java.awt.Color;
-import java.awt.Graphics2D;
-import java.awt.Rectangle;
-
-/**
- * Represents a food item.
- * <p>
- * Project: <strong>Snake</strong><br>
- * File: <strong>Food.java</strong><br>
- * Created: <strong>01.07.2020</strong><br>
- * 
- * @author Kai S. K. Engelbart
- * @since Snake 1.2
- */
-public final class Food implements Updateable {
-
-	private final Color color;
-	private final int lengthBonus;
-	private final Rectangle bounds;
-
-	/**
-	 * Constructs a food item.
-	 * 
-	 * @param color       the color of the food item
-	 * @param lengthBonus the length added to the snake when the food item is eaten
-	 * @param bounds      the bounds of the food item
-	 * @since Snake 1.2
-	 */
-	public Food(Color color, int lengthBonus, Rectangle bounds) {
-		this.color = color;
-		this.lengthBonus = lengthBonus;
-		this.bounds = bounds;
-	}
-
-	@Override
-	public void render(Graphics2D g) {
-		g.setColor(color);
-		g.fill(bounds);
-	}
-
-	/**
-	 * @return the length added to the snake when the food item is eaten
-	 * @since Snake 1.2
-	 */
-	public int getLengthBonus() { return lengthBonus; }
-
-	/**
-	 * @return the bounds of the food item
-	 * @since Snake 1.2
-	 */
-	public Rectangle getBounds() { return bounds; }
-}

src/main/dev/lh/FoodFactory.java

@@ -1,69 +1,229 @@
 package dev.lh;
 
-import static java.awt.Color.*;
+import java.awt.*;
 
-import java.awt.Color;
+import dev.lh.ui.GameWindow;
-import java.awt.Rectangle;
-import java.util.Random;
 
 /**
- * Generates food items with predefined properties at random positions and calculates the next
- * spawning time.
- * <p>
  * Project: <strong>Snake</strong><br>
  * File: <strong>FoodFactory.java</strong><br>
  * Created: <strong>11 Mar 2020</strong><br>
  *
  * @author Leon Hofmeister
- * @author Kai S. K. Engelbart
  * @since Snake 1.0
  */
-public final class FoodFactory {
+public class FoodFactory {
-
-	private int width, height;
-	private long nextSpawnTime;
-	private Random random = new Random();
-
-	private static final Color[] FOOD_COLORS = {
-		WHITE, YELLOW, ORANGE, RED, BLUE
-	};
-	private static final int[] FOOD_LENGTH_BONUSES = {
-		40, 15, 6, 2, 1
-	};
 
 	/**
-	 * Initializes a food factory.
+	 * This enum contains all possible variations of foods. The higher the ordinal
+	 * of an element, the less it is worth.<br>
+	 * <br>
+	 * Project: <strong>Snake</strong><br>
+	 * File: <strong>FoodFactory.java</strong><br>
+	 * Created: <strong>11 Mar 2020</strong><br>
 	 *
-	 * @param width  the width of the viewport
+	 * @author Leon Hofmeister
-	 * @param height the height of the viewport
+	 * @since Snake 1.0
-	 * @since Snake 1.2
 	 */
-	public FoodFactory(int width, int height) {
+	public static enum Food {
-		this.width = width;
+		/**
-		this.height = height;
+		 * Use if white food is wanted.
+		 */
+		white,
+
+		/**
+		 * Use if yellow food is wanted.
+		 */
+		yellow,
+
+		/**
+		 * Use if orange food is wanted.
+		 */
+		orange,
+
+		/**
+		 * Use if red food is wanted.
+		 */
+		red,
+
+		/**
+		 * Use if blue food is wanted.
+		 */
+		blue
+	}
+
+	private static FoodFactory foodFactory = new FoodFactory();
+
+	private long timeOfNextFood;
+
+	Point pFood = null;
+
+	private Food nextFood = Food.white;
+
+	private int rectangleSize = 6;
+
+	private FoodFactory() {}
+
+	/**
+	 * @return the (singleton) instance of FoodFactory
+	 * @since Snake 1.0
+	 */
+	public static FoodFactory getInstance() { return foodFactory; }
+
+	/**
+	 * @return a new {@link Food} object without its position
+	 * @since Snake 1.0
+	 */
+	public Food generateFood() {
+		int nextFoodIs = (int) Math.floor(Math.random() * 5);
+		switch (nextFoodIs) {
+
+			case 0:
+				nextFood = Food.white;
+				break;
+			case 1:
+				nextFood = Food.yellow;
+				break;
+			case 2:
+				nextFood = Food.orange;
+				break;
+			case 3:
+				nextFood = Food.red;
+				break;
+			case 4:
+				nextFood = Food.blue;
+				break;
+			default:
+				nextFood = generateFood();
+		}
+		rectangleSize = nextFood.ordinal() + 2;
+		setTimeToNextFoodMillis();
+		return nextFood;
 	}
 
 	/**
-	 * @return a new food item
+	 * Generates the amount of time that needs to pass before the next food object
-	 * @since Snake 1.2
+	 * will be constructed.
+	 *
+	 * @since Snake 1.0
 	 */
-	public synchronized Food spawn() {
+	public void setTimeToNextFoodMillis() { timeOfNextFood = System.currentTimeMillis() + (int) Math.round(Math.random() * 15000 + 1000); }
-		nextSpawnTime = System.currentTimeMillis() + random.nextInt(15000) + 1000;
+
-		int seed = random.nextInt(5);
+	/**
-		return new Food(
+	 * @return the type of the next food
-			FOOD_COLORS[seed],
+	 * @since Snake 1.0
-			FOOD_LENGTH_BONUSES[seed],
+	 */
-			new Rectangle(random.nextInt(width - 100) + 50,
+	public Food getNextFood() { return nextFood; }
-				random.nextInt(height - 100) + 50,
+
-				10 + seed * 5,
+	/**
-				10 + seed * 5
+	 * @param nextFood the type the next food should have
-			)
+	 * @since Snake 1.0
-		);
+	 */
+	public void setNext(Food nextFood) { this.nextFood = nextFood; }
+
+	/**
+	 * @return the time at which a new food object will be automatically created
+	 * @since Snake 1.0
+	 */
+	public long getTimeOfNextFood() { return timeOfNextFood; }
+
+	/**
+	 * @param width  the width of the currently used {@link GameWindow}
+	 * @param height the height of the currently used {@link GameWindow}
+	 * @return the position of the new {@link Food} object
+	 * @since Snake 1.0
+	 */
+	public Point generateFoodLocation(int width, int height) {
+		pFood = new Point((int) Math.round(Math.random() * width), (int) Math.round(Math.random() * height));
+		if (pFood.x < 50 || pFood.x > width - 50 || pFood.y < 50 || pFood.y > height - 50) {
+			pFood.x	= (pFood.x < 50) ? 50 : (pFood.x > width - 50) ? width - 50 : pFood.x;
+			pFood.y	= (pFood.y < 50) ? 50 : (pFood.y > height - 50) ? height - 50 : pFood.y;
+		}
+		return pFood;
 	}
 
 	/**
-	 * @return the time after which a new food item should be spawned
+	 * @return the size of the corresponding food (length = width)
-	 * @since Snake 1.2
+	 * @since Snake 1.0
 	 */
-	public long getNextSpawnTime() { return nextSpawnTime; }
+	public int getRectangleSize() { return rectangleSize; }
+
+	/**
+	 * @return the location of the currently displayed food
+	 * @since Snake 1.0
+	 */
+	public Point getFoodLocation() { return pFood; }
+
+	/**
+	 * Sets the color of the given {@link Graphics} object according to the type of
+	 * food.
+	 *
+	 * @param g the graphics object to paint
+	 * @since Snake 1.0
+	 */
+	public void colorOfFood(Graphics g) {
+		switch (nextFood) {
+			case white:
+				g.setColor(Color.white);
+				break;
+			case yellow:
+				g.setColor(Color.yellow);
+				break;
+			case orange:
+				g.setColor(Color.orange);
+				break;
+			case red:
+				g.setColor(Color.red);
+				break;
+			case blue:
+				g.setColor(Color.blue);
+				break;
+		}// switch
+	}
+
+	/**
+	 * @param g the {@link Graphics} object used to paint the current food object
+	 * @since Snake 1.0
+	 */
+	public void paintFood(Graphics g) {
+		colorOfFood(g);
+		g.fillRect(pFood.x, pFood.y, 5 * rectangleSize, 5 * rectangleSize);
+	}
+
+	/**
+	 * @param snakeHead the the head of a {@link Snake} object
+	 * @return true if the current food intersects with the snakehead
+	 * @since Snake 1.0
+	 */
+	public boolean checkCollision(Rectangle snakeHead) {
+		int			s		= rectangleSize * 5;
+		Rectangle	food	= new Rectangle(pFood, new Dimension(s, s));
+		return food.intersects(snakeHead);
+	}
+
+	/**
+	 * @return the length that will be added to the snake
+	 * @since Snake 1.0
+	 */
+	public int getAdditionalLength() {
+		int snakeAdditionalLength = 0;
+		switch (nextFood) {
+			case white:
+				snakeAdditionalLength = 40;
+				break;
+			case yellow:
+				snakeAdditionalLength = 15;
+				break;
+			case orange:
+				snakeAdditionalLength = 6;
+				break;
+			case red:
+				snakeAdditionalLength = 2;
+				break;
+			case blue:
+				snakeAdditionalLength = 1;
+				break;
+		}
+		return snakeAdditionalLength;
+	}
 }

src/main/dev/lh/Handler.java

@@ -1,54 +0,0 @@
-package dev.lh;
-
-import java.awt.Graphics2D;
-
-/**
- * Manages the state of game objects.
- * <p>
- * Project: <strong>Snake</strong><br>
- * File: <strong>Handler.java</strong><br>
- * Created: <strong>01.07.2020</strong><br>
- * 
- * @author Kai S. K. Engelbart
- * @since Snake 1.2
- */
-public final class Handler implements Updateable {
-
-	private Snake snake = new Snake(7);
-	private FoodFactory foodFactory;
-
-	private volatile Food food;
-
-	/**
-	 * Constructs a handler.
-	 * 
-	 * @param snake       the snake
-	 * @param foodFactory the food factory
-	 * @since Snake 1.2
-	 */
-	public Handler(Snake snake, FoodFactory foodFactory) {
-		this.snake = snake;
-		this.foodFactory = foodFactory;
-		food = foodFactory.spawn();
-	}
-
-	@Override
-	public void tick() {
-		snake.tick();
-		food.tick();
-
-		// Check for food collision
-		if (snake.getHead().intersects(food.getBounds())) {
-			snake.addLength(food.getLengthBonus());
-			food = foodFactory.spawn();
-		}
-		if (System.currentTimeMillis() > foodFactory.getNextSpawnTime())
-			food = foodFactory.spawn();
-	}
-
-	@Override
-	public void render(Graphics2D g) {
-		snake.render(g);
-		food.render(g);
-	}
-}

src/main/dev/lh/Snake.java

@@ -1,12 +1,14 @@
 package dev.lh;
 
 import java.awt.Color;
-import java.awt.Graphics2D;
+import java.awt.Graphics;
+import java.awt.Point;
 import java.awt.Rectangle;
 import java.util.ArrayList;
 import java.util.List;
 
 import dev.lh.ui.Endscreen;
+import dev.lh.ui.GameWindow;
 
 /**
  * Project: <strong>Snake</strong><br>
@@ -28,34 +30,34 @@ public class Snake implements Updateable {
 	 * @author Leon Hofmeister
 	 * @since Snake 1.0
 	 */
-	public enum Direction {
+	public static enum Direction {
 		/**
 		 * Use if the snake should head left.
 		 */
-		LEFT,
+		Left,
 
 		/**
 		 * Use if the snake should head right.
 		 */
-		RIGHT,
+		Right,
 
 		/**
 		 * Use if the snake should head up.
 		 */
-		UP,
+		Up,
 
 		/**
 		 * Use if the snake should head down.
 		 */
-		DOWN;
+		Down;
 	}
 
-	private static Endscreen		endscreen;
+	private static FoodFactory	foodFactory	= FoodFactory.getInstance();
-	private Direction				direction	= Direction.RIGHT;
+	private static Endscreen	endscreen;
-	private int						length;
+	private Direction			Richtung;
-	private final List<Rectangle>	tiles		= new ArrayList<>();
+	private int					length;
-
+	private List<Point>			tiles		= new ArrayList<>();
-	private static final int TILE_SIZE = 10;
+	private final int			snakeSize	= 10;
 
 	/**
 	 * Constructs a new Snake with the given length in tiles.
@@ -64,24 +66,61 @@ public class Snake implements Updateable {
 	 * @since Snake 1.0
 	 */
 	public Snake(int length) {
-		this.length = length;
+		this.length	= length;
-
+		Richtung	= Direction.Right;
-		// Add initial tiles
+		// adding the initial tiles of the snake
 		for (int i = 0; i < length; i++)
-			tiles.add(new Rectangle(320 - TILE_SIZE * i, 240, TILE_SIZE, TILE_SIZE));
+			tiles.add(new Point(320 - snakeSize * i, 240));
+	}
+
+	@Override
+	public void nextFrame() {
+		int velX = 0, velY = 0;
+		switch (Richtung) {
+			case Up:
+				velY = -snakeSize;
+				break;
+			case Down:
+				velY = snakeSize;
+				break;
+			case Left:
+				velX = -snakeSize;
+				break;
+			case Right:
+				velX = snakeSize;
+				break;
+		}
+		Point next = (Point) tiles.get(0).clone(), cur;
+		tiles.get(0).x	+= velX;
+		tiles.get(0).y	+= velY;
+
+		for (int i = 1; i < length; i++) {
+			cur = tiles.get(i);
+			tiles.set(i, (Point) next.clone());
+			next = cur;
+		}
+
+		// case if snake is outside of the screen or touches itself
+		if (checkSelfCollision()) gameOver();
+		// TODO: the game bounds checking below appears to work on Windows, however throws a NullPointerException on Linux/UNIX systems
+		// if (!Main.getGame().getBounds().contains(tiles.get(0))) gameOver();
+
+		// case if snake eats food
+		if (foodFactory.checkCollision(new Rectangle(tiles.get(0).x, tiles.get(0).y, snakeSize, snakeSize))) {
+			addLength(foodFactory.getAdditionalLength());
+			GameWindow game = Main.getGame();
+			game.newFood();
+		}
 	}
 
 	/**
-	 * Increases the given length to the current snake object.
 	 *
-	 * @param additional the number of tiles to add
+	 * @since Snake 1.1
-	 * @since Snake 1.0
 	 */
-	public void addLength(int additional) {
+	private void gameOver() {
-		final Rectangle last = tiles.get(tiles.size() - 1);
+		endscreen = new Endscreen(length);
-		for (int i = 0; i < additional; i++)
+		endscreen.setVisible(true);
-			tiles.add(last);
+		Main.getGame().close();
-		length += additional;
 	}
 
 	/**
@@ -89,77 +128,44 @@ public class Snake implements Updateable {
 	 * @since Snake 1.1
 	 */
 	private boolean checkSelfCollision() {
-		return tiles.stream().skip(1).anyMatch(tiles.get(0)::contains);
+		Point		headIndex	= tiles.get(0);
-	}
+		Rectangle	head		= new Rectangle(headIndex.x, headIndex.y, snakeSize, snakeSize);
-
+		for (int index = 1; index < tiles.size(); index++) {
-	/**
+			Point bodyIndex = tiles.get(index);
-	 * @since Snake 1.1
+			if (head.contains(new Rectangle(bodyIndex.x, bodyIndex.y, snakeSize, snakeSize))) return true;
-	 */
+		}
-	private void gameOver() {
+		return false;
-		Main.getGame().close();
-		endscreen = new Endscreen(length);
-		endscreen.setVisible(true);
 	}
 
 	@Override
-	public void tick() {
+	public void render(Graphics g) {
-		int velX = 0, velY = 0;
-		switch (direction) {
-			case UP:
-				velY = -TILE_SIZE;
-				break;
-			case DOWN:
-				velY = TILE_SIZE;
-				break;
-			case LEFT:
-				velX = -TILE_SIZE;
-				break;
-			case RIGHT:
-				velX = TILE_SIZE;
-				break;
-		}
-		// Add a new tile at the front
-		tiles.add(
-			0,
-			new Rectangle(tiles.get(0).x + velX, tiles.get(0).y + velY, TILE_SIZE, TILE_SIZE)
-		);
-		// Remove the last tile
-		tiles.remove(tiles.size() - 1);
-		// Case if snake is outside of the screen or touches itself
-		if (checkSelfCollision()) {
-			gameOver();
-			System.out.println("Snake collided with itself.");
-			return;
-		}
-		// TODO: Test on Linux
-		if (!Main.getGame().getBounds().contains(getHead())) {
-			gameOver();
-			System.out.println("Snake went out of bounds.");
-			return;
-		}
-	}
-
-	@Override
-	public void render(Graphics2D g) {
 		g.setColor(Color.green);
-		tiles.forEach(g::fill);
+		for (int i = 0; i < length; i++)
+			g.fillRect(tiles.get(i).x, tiles.get(i).y, snakeSize, snakeSize);
 	}
 
 	/**
 	 * @return the current {@link Direction} of the snake
-	 * @since Snake 1.2
-	 */
-	public Direction getDirection() { return direction; }
-
-	/**
-	 * @param direction the new {@link Direction} of the snake
 	 * @since Snake 1.0
 	 */
-	public void setDirection(Direction direction) { this.direction = direction; }
+	public Direction getRichtung() { return Richtung; }
 
 	/**
-	 * @return a rectangle representing the head of the snake
+	 * @param richtung the new {@link Direction} of the snake
-	 * @since Snake 1.2
+	 * @since Snake 1.0
 	 */
-	public Rectangle getHead() { return tiles.get(0); }
+	public void setRichtung(Direction richtung) { Richtung = richtung; }
+
+	/**
+	 * Adds the given length to the current snake object
+	 *
+	 * @param additional the number of tiles to add
+	 * @since Snake 1.0
+	 */
+	public void addLength(int additional) {
+		Point last = tiles.get(tiles.size() - 1);
+		for (int i = 0; i < additional; i++)
+			tiles.add(last);
+		length += additional;
+	}
 }

src/main/dev/lh/Updateable.java

@@ -1,10 +1,10 @@
 package dev.lh;
 
-import java.awt.Graphics2D;
+import java.awt.Graphics;
 
 /**
- * This interface contains everything that needs to be updated regularly.
+ * This interface contains everything that needs to updated regularly.<br>
- * <p>
+ * <br>
  * Project: <strong>Snake</strong><br>
  * File: <strong>Updateable.java</strong><br>
  * Created: <strong>11 Mar 2020</strong><br>
@@ -18,15 +18,15 @@ public interface Updateable {
 	 * Here should the actions be implemented that are supposed to happen when a new
 	 * frame gets created.
 	 *
-	 * @since Snake 1.2
+	 * @since Snake 1.0
 	 */
-	default void tick() {}
+	void nextFrame();
 
 	/**
 	 * Renders the object.
 	 *
-	 * @param g the graphics object that is used to render this object
+	 * @param g the {@link Graphics} object that is used to render this object
 	 * @since Snake 1.0
 	 */
-	default void render(Graphics2D g) {}
+	void render(Graphics g);
 }

src/main/dev/lh/Viewport.java

@@ -1,94 +0,0 @@
-package dev.lh;
-
-import java.awt.Canvas;
-import java.awt.Color;
-import java.awt.Graphics2D;
-import java.util.Timer;
-import java.util.TimerTask;
-
-/**
- * Implements a hardware-accelerated rendering loop.
- * <p>
- * Project: <strong>Snake</strong><br>
- * File: <strong>Viewport.java</strong><br>
- * Created: <strong>01.07.2020</strong><br>
- *
- * @author Kai S. K. Engelbart
- * @since Snake 1.2
- */
-public class Viewport extends Canvas {
-
-	private static final long serialVersionUID = 1L;
-
-	// Enable OpenGL hardware acceleration
-	static {
-		System.setProperty("sun.java2d.trace", "timestamp,log,count");
-		System.setProperty("sun.java2d.transaccel", "True");
-		System.setProperty("sun.java2d.opengl", "True");
-	}
-
-	private Updateable gameRoot;
-	private Timer timer = new Timer();
-	private TimerTask renderTask;
-
-	/**
-	 * @param gameRoot the game object responsible for updating the rest
-	 * @since Snake 1.2
-	 */
-	public Viewport(Updateable gameRoot) {
-		this.gameRoot = gameRoot;
-		setIgnoreRepaint(true);
-	}
-
-	/**
-	 * Starts the render task.
-	 *
-	 * @since Snake 1.2
-	 */
-	public void start() {
-		if (renderTask != null) renderTask.cancel();
-		else createBufferStrategy(2);
-
-		renderTask = new TimerTask() {
-
-			// private long lastTime = System.currentTimeMillis();
-
-			@Override
-			public void run() {
-				// final long time = System.currentTimeMillis();
-				// final double dt = (time - lastTime) * 1E-3;
-				// lastTime = time;
-				// TODO: Delta time adjustment
-				gameRoot.tick();
-				render();
-			}
-		};
-
-		timer.schedule(renderTask, 0, 100);
-	}
-
-	/**
-	 * Stops the render task.
-	 *
-	 * @since Snake 1.2
-	 */
-	public void stop() { renderTask.cancel(); }
-
-	private void render() {
-		final Graphics2D g = (Graphics2D) getBufferStrategy().getDrawGraphics();
-
-		// Clear the screen
-		g.setColor(Color.BLACK);
-		g.fillRect(0, 0, getWidth(), getHeight());
-
-		// Perform the actual rendering
-		gameRoot.render(g);
-
-		// Flip buffers
-		g.dispose();
-		getBufferStrategy().show();
-
-		// Synchronize with display refresh rate
-		getToolkit().sync();
-	}
-}

src/main/dev/lh/ui/Endscreen.java

@@ -1,7 +1,6 @@
 package dev.lh.ui;
 
-import java.awt.BorderLayout;
+import java.awt.*;
-import java.awt.Font;
 import java.awt.event.KeyEvent;
 
 import javax.swing.*;
@@ -21,9 +20,9 @@ public class Endscreen extends JDialog {
 
 	private static final long serialVersionUID = -4457484397259161063L;
 
-	// private static final int goodOrBadResult = 200;
+	private final JPanel		contentPanel	= new JPanel();
-	private final JPanel	contentPanel	= new JPanel();
+	private int					score			= 0;
-	private final int		score;
+	private static final int	goodOrBadResult	= 200;
 
 	/**
 	 * Create the dialog.
@@ -32,28 +31,49 @@ public class Endscreen extends JDialog {
 	 */
 	public Endscreen(int score) {
 		this.score = score;
-		setTitle("Endscreen");
+		try {
-		setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
+			// readInHighscoresPoints();
-		setBounds(100, 100, 700, 700);
+			// readInHighscoresPlayers();
-		getContentPane().setLayout(new BorderLayout());
-		contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
-		contentPanel.setLayout(new BorderLayout(0, 0));
-		getContentPane().add(contentPanel, BorderLayout.CENTER);
 
-		final JButton btnNewButton = new JButton("Play again");
+			setTitle("Endscreen");
+			setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
+			setBounds(100, 100, 700, 700);
+			getContentPane().setLayout(new BorderLayout());
+			contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
+			getContentPane().add(contentPanel, BorderLayout.CENTER);
+			addWindowListener(new java.awt.event.WindowAdapter() {
+
+				@Override
+				public void windowClosing(java.awt.event.WindowEvent windowEvent) {
+					Thread.getAllStackTraces().forEach((thread, stackTraceElement) -> thread.interrupt());
+					System.exit(0);
+				}
+			});
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+		JButton btnNewButton = new JButton("Play again");
 		btnNewButton.setMnemonic(KeyEvent.VK_ENTER);
 		btnNewButton.addActionListener(e -> { Main.startGame(); dispose(); });
+		contentPanel.setLayout(new BorderLayout(0, 0));
+		// btnNewButton.setIcon(new
+		// ImageIcon(ClassLoader.getSystemResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
+		btnNewButton.setIconTextGap(5);
 		btnNewButton.setFont(new Font("Times New Roman", Font.PLAIN, 15));
 		contentPanel.add(btnNewButton, BorderLayout.SOUTH);
 
-		final JLabel lblDeinPunktestand = new JLabel("Dein Punktestand:	     " + String.valueOf(score));
+		JLabel lblDeinPunktestand = new JLabel("Dein Punktestand:	     " + String.valueOf(score));
 		lblDeinPunktestand.setFont(new Font("Times New Roman", Font.PLAIN, 25));
 		contentPanel.add(lblDeinPunktestand, BorderLayout.NORTH);
 
-		// final Image resultImage = Toolkit.getDefaultToolkit()
+//TODO: the display ofthe result image could work, but not guaranteed		
-		// .getImage(this.getClass().getResource(score < goodOrBadResult ?
+//		Image resultImage = Toolkit.getDefaultToolkit()
-		// "/Try_Again.jpg" : "/1211548-200.png"));
+//			.getImage(this.getClass()
-		// resultImage.flush();
+//				.getResource((score < goodOrBadResult) ? "/Snake/src/main/resources/Try_Again.jpg" : "/Snake/src/main/resources/1211548-200.png"));
+//		resultImage.flush();
+
+		setVisible(true);
 	}
 
 	/**
@@ -61,4 +81,10 @@ public class Endscreen extends JDialog {
 	 * @since Snake 1.0
 	 */
 	public int getScore() { return score; }
+
+	/**
+	 * @param score the new highscore
+	 * @since Snake 1.0
+	 */
+	public void setScore(int score) { this.score = score; }
 }

src/main/dev/lh/ui/GameWindow.java

@@ -1,14 +1,15 @@
 package dev.lh.ui;
 
-import java.awt.Dimension;
+import java.awt.*;
-import java.awt.Rectangle;
-import java.awt.Toolkit;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 
 import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.Timer;
 
-import dev.lh.*;
+import dev.lh.FoodFactory;
+import dev.lh.Snake;
 import dev.lh.Snake.Direction;
 
 /**
@@ -21,20 +22,21 @@ import dev.lh.Snake.Direction;
  */
 public class GameWindow extends JFrame {
 
-	private static final long serialVersionUID = 1L;
+	private static final long	serialVersionUID	= 1L;
-
+	private Snake				s					= new Snake(7);
-	private Viewport viewport;
+	private FoodFactory			foodFactory			= FoodFactory.getInstance();
 
 	/**
 	 * @param title the title of the frame
 	 * @since Snake 1.0
 	 */
 	public GameWindow(String title) {
-		// Initialize window
 		super(title);
+		newFood();
 		Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
 		setBounds(new Rectangle(size));
 		setLocation(0, 0);
+		setLocationRelativeTo(null);
 		setMinimumSize(size);
 		setPreferredSize(size);
 		setMaximumSize(size);
@@ -42,14 +44,19 @@ public class GameWindow extends JFrame {
 		setResizable(false);
 		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
-		// Initialize game objects
+		add(new JPanel() {
-		Snake snake = new Snake(7);
-		FoodFactory foodFactory = new FoodFactory(getWidth(), getHeight());
-		Handler handler = new Handler(snake, foodFactory);
 
-		// Initialize viewport
+			private static final long serialVersionUID = 1L;
-		viewport = new Viewport(handler);
+
-		add(viewport);
+			@Override
+			protected void paintComponent(Graphics g) {
+				super.paintComponent(g);
+				g.setColor(Color.black);
+				g.fillRect(0, 0, super.getWidth(), super.getHeight());
+				s.render(g);
+				foodFactory.paintFood(g);
+			}
+		});
 
 		addKeyListener(new KeyAdapter() {
 
@@ -59,40 +66,46 @@ public class GameWindow extends JFrame {
 				switch (e.getKeyCode()) {
 					case KeyEvent.VK_W:
 					case KeyEvent.VK_UP:
-						if (!snake.getDirection().equals(Direction.DOWN))
+						if (!s.getRichtung().equals(Direction.Down)) s.setRichtung(Direction.Up);
-							snake.setDirection(Direction.UP);
 						break;
 					case KeyEvent.VK_A:
 					case KeyEvent.VK_LEFT:
-						if (!snake.getDirection().equals(Direction.RIGHT))
+						if (!s.getRichtung().equals(Direction.Right)) s.setRichtung(Direction.Left);
-							snake.setDirection(Direction.LEFT);
 						break;
 					case KeyEvent.VK_S:
 					case KeyEvent.VK_DOWN:
-						if (!snake.getDirection().equals(Direction.UP))
+						if (!s.getRichtung().equals(Direction.Up)) s.setRichtung(Direction.Down);
-							snake.setDirection(Direction.DOWN);
 						break;
 					case KeyEvent.VK_D:
 					case KeyEvent.VK_RIGHT:
-						if (!snake.getDirection().equals(Direction.LEFT))
+						if (!s.getRichtung().equals(Direction.Left)) s.setRichtung(Direction.Right);
-							snake.setDirection(Direction.RIGHT);
 						break;
 				}
 			}
 		});
 
+		Timer timer = new Timer(50,
+				evt -> { s.nextFrame(); if (System.currentTimeMillis() >= foodFactory.getTimeOfNextFood()) newFood(); repaint(); });
+		timer.start();
+
 		setVisible(true);
-		viewport.start();
 	}
 
 	/**
-	 * Disposes this frame.
+	 * Generates new food
 	 *
 	 * @since Snake 1.1
 	 */
-	public void close() {
+	public void newFood() {
-		viewport.stop();
+		foodFactory.generateFood();
-		setVisible(false);
+		foodFactory.generateFoodLocation(getWidth(), getHeight());
-		dispose();
+		repaint();
 	}
+
+	/**
+	 * Disposes this frame
+	 *
+	 * @since Snake 1.1
+	 */
+	public void close() { dispose(); }
 }

src/main/dev/lh/ui/StartScreen.java

@@ -19,10 +19,11 @@ import dev.lh.Main;
  */
 public class StartScreen extends JFrame {
 
-	private static final long serialVersionUID = 6055940532003735543L;
+	private static final long	serialVersionUID	= 6055940532003735543L;
+	private JPanel				contentPane;
 
 	/**
-	 * Closes the application.
+	 * closes the application.
 	 */
 	public static void close() { System.exit(0); }
 
@@ -32,32 +33,48 @@ public class StartScreen extends JFrame {
 	 * @param args the program arguments
 	 * @since Snake 1.0
 	 */
-	public static void main(String[] args) { EventQueue.invokeLater(StartScreen::new); }
+	public static void main(String[] args) {
+		EventQueue.invokeLater(() -> {
+			try {
+				StartScreen frame = new StartScreen();
+				frame.setVisible(true);
+			} catch (Exception e) {
+				e.printStackTrace();
+			}
+		});
+	}
 
 	/**
 	 * Create the frame.
 	 */
 	public StartScreen() {
-		setTitle("Snake - Startscreen");
+		try {
-		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+			// readInHighscores();
-		setBounds(500, 200, 550, 550);
+			setTitle("Snake - Startscreen");
+			setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+			setBounds(500, 200, 550, 550);
+			contentPane = new JPanel();
+			contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
+			setContentPane(contentPane);
 
-		final JPanel contentPane = new JPanel();
+			JButton buPlay = new JButton("Start Game");
-		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
+			buPlay.setBounds(158, 197, 190, 131);
-		setContentPane(contentPane);
+			buPlay.setIcon(new ImageIcon(StartScreen.class.getResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
+			buPlay.setMnemonic(KeyEvent.VK_ENTER);
+			buPlay.setFont(new Font("Times New Roman", Font.PLAIN, 16));
 
-		final JButton buPlay = new JButton("Start Game");
+			buPlay.addActionListener(a -> {
-		buPlay.setBounds(158, 197, 190, 131);
+
-		buPlay.setMnemonic(KeyEvent.VK_ENTER);
+				Main.startGame();
-		buPlay.setFont(new Font("Times New Roman", Font.PLAIN, 16));
+				setVisible(false);
-		buPlay.addActionListener(a -> {
+				dispose();
-			Main.startGame();
+				System.gc();
-			setVisible(false);
+			});
-			dispose();
+			contentPane.setLayout(null);
-			System.gc();
+
-		});
+		} catch (Exception e) {
-		contentPane.add(buPlay);
+
-		contentPane.setLayout(null);
+			e.printStackTrace();
-		setVisible(true);
+		}
 	}
 }