Updated missing Javadoc in whole repository

* reformatted whole repository
* fixed bug enabling 180° turnaround

src/main/dev/lh/Food.java

@@ -4,18 +4,42 @@ import java.awt.Color;
 import java.awt.Graphics;
 import java.awt.Point;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Food.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class Food {
 
 	private Point position;
 
-	public Food(int x, int y) {
-		position = new Point(x,y);
-	}
+	/**
+	 * Constructs a new food object.
+	 *
+	 * @param x the x coordinate of the new food
+	 * @param y the y coordinate of the new food
+	 * @since Snake 1.0
+	 */
+	public Food(int x, int y) { position = new Point(x, y); }
 
+	/**
+	 * Constructs a new food object.
+	 *
+	 * @param position the position of the food
+	 * @since Snake 1.1
+	 */
+	public Food(Point position) { this.position = position; }
+
+	/**
+	 * @param g the {@link Graphics} object used to draw the food
+	 * @since Snake 1.0
+	 */
 	public void render(Graphics g) {
 		g.setColor(Color.yellow);
 		g.fillRect(position.x, position.y, 16, 16);
 	}
 
-	
 }

src/main/dev/lh/FoodFactory.java

@@ -6,61 +6,137 @@ import java.awt.Graphics;
 import java.awt.Point;
 import java.awt.Rectangle;
 
+import dev.lh.ui.GameWindow;
+
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>FoodFactory.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class FoodFactory {
 
+	/**
+	 * 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>
+	 *
+	 * @author Leon Hofmeister
+	 * @since Snake 1.0
+	 */
 	public static enum Food {
-		white, yellow, orange, red, blue
+		/**
+		 * 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;
 
-	public int rectangleSize = 6;
+	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();
+			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;
 	}
 
-	public void setTimeToNextFoodMillis() {
-		timeOfNextFood=System.currentTimeMillis()+(int) Math.round(Math.random()  * 15000+1000);;
-	}
+	/**
+	 * Generates the amount of time that needs to pass before the next food object
+	 * will be constructed.
+	 *
+	 * @since Snake 1.0
+	 */
+	public void setTimeToNextFoodMillis() { timeOfNextFood = System.currentTimeMillis() + (int) Math.round(Math.random() * 15000 + 1000); }
 
-	public Food getNextFood() {
-		return nextFood;
-	}
+	/**
+	 * @return the type of the next food
+	 * @since Snake 1.0
+	 */
+	public Food getNextFood() { return nextFood; }
 
-	public void setNext(Food nextFood) {
-		this.nextFood = nextFood;
-	}
+	/**
+	 * @param nextFood the type the next food should have
+	 * @since Snake 1.0
+	 */
+	public void setNext(Food nextFood) { this.nextFood = nextFood; }
 
-	public long getTimeOfNextFood() {
-		return timeOfNextFood;
-	}
+	/**
+	 * @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) {
@@ -70,43 +146,87 @@ public class FoodFactory {
 		return pFood;
 	}
 
-	public int getRectangleSize() {
-		return rectangleSize;
-	}
+	/**
+	 * @return the size of the corresponding food (length = width)
+	 * @since Snake 1.0
+	 */
+	public int getRectangleSize() { return rectangleSize; }
 
-	public Point getFoodLocation() {
-		return pFood;
-	}
+	/**
+	 * @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;	
+			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;	
+			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;
 		}// switch
 		return snakeAdditionalLength;
 	}

src/main/dev/lh/Handler.java

@@ -3,10 +3,25 @@ package dev.lh;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * The handler handles incoming events in Snake.<br>
+ * <br>
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Handler.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class Handler {
 
 	List<Updateable> targets;
 
+	/**
+	 * Constructs a new {@link Handler}.
+	 *
+	 * @since Snake 1.0
+	 */
 	public Handler() {
 		targets = new ArrayList<>();
 		targets.add(new Snake(3));

src/main/dev/lh/Main.java

@@ -2,21 +2,41 @@ package dev.lh;
 
 import dev.lh.ui.GameWindow;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Main.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class Main {
 
 	private static GameWindow game;
+
+	/**
+	 * @param args the program arguments
+	 * @since Snake 1.0
+	 */
 	public static void main(String[] args) {
 		// if wanted, the StartScreen can be added here
 		startGame();
 	}
 
+	/**
+	 * Starts a new game of Snake.
+	 *
+	 * @since Snake 1.0
+	 */
 	public static void startGame() {
 		game = new GameWindow("Snake");
 		game.setVisible(true);
 	}
 
-	public static GameWindow getGame() {
-		return game;
-	}
+	/**
+	 * @return the currently used game
+	 * @since Snake 1.0
+	 */
+	public static GameWindow getGame() { return game; }
 
 }

src/main/dev/lh/Snake.java

@@ -9,28 +9,71 @@ import java.util.List;
 
 import dev.lh.ui.GameWindow;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Snake.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class Snake implements Updateable {
 
+	/**
+	 * This enum contains all possible directions for the {@link Snake}.<br>
+	 * <br>
+	 * Project: <strong>Snake</strong><br>
+	 * File: <strong>Snake.java</strong><br>
+	 * Created: <strong>11 Mar 2020</strong><br>
+	 *
+	 * @author Leon Hofmeister
+	 * @since Snake 1.0
+	 */
 	public static enum Direction {
-		Left, Right, Up, Down;
+		/**
+		 * Use if the snake should head left.
+		 */
+		Left,
+
+		/**
+		 * Use if the snake should head right.
+		 */
+		Right,
+
+		/**
+		 * Use if the snake should head up.
+		 */
+		Up,
+
+		/**
+		 * Use if the snake should head down.
+		 */
+		Down;
 	}
+
 	private Direction			Richtung;
 	private int					length;
 	private List<Point>			tiles		= new ArrayList<>();
 	private static FoodFactory	foodFactory	= FoodFactory.getInstance();
 	private final int			snakeSize	= 10;
 
+	/**
+	 * Constructs a new Snake with the given length in tiles.
+	 *
+	 * @param length the length of the snake in tiles
+	 * @since Snake 1.0
+	 */
 	public Snake(int length) {
 		this.length	= length;
 		Richtung	= Direction.Left;
 
-		for(int i = 0; i<length;i++) {
+		for (int i = 0; i < length; i++)
 			tiles.add(new Point(320 - 50 * i, 240));
-		}
 
 	}// End Constructor
+
 	@Override
-	public void tick() {
+	public void nextFrame() {
 		int velX = 0, velY = 0;
 		switch (Richtung) {
 
@@ -51,7 +94,6 @@ public class Snake implements Updateable {
 		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());
@@ -65,30 +107,38 @@ public class Snake implements Updateable {
 		}
 
 	}// End tick
+
 	@Override
 	public void render(Graphics g) {
 		g.setColor(Color.green);
 
-		for (int i = 0; i<length;i++) {
+		for (int i = 0; i < length; i++)
 			g.fillRect(tiles.get(i).x, tiles.get(i).y, snakeSize, snakeSize);
 
-		}
-		
-		
 	}// End render
 
-	public Direction getRichtung() {
-		return Richtung;
-	}
+	/**
+	 * @return the current {@link Direction} of the snake
+	 * @since Snake 1.0
+	 */
+	public Direction getRichtung() { return Richtung; }
 
-	public void setRichtung(Direction richtung) {
-		Richtung = richtung;
-	}
+	/**
+	 * @param richtung the new {@link Direction} of the snake
+	 * @since Snake 1.0
+	 */
+	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) {
-		for(int i=0;i<additional;i++) {
-			tiles.add(null);
-		}
+		Point last = tiles.get(tiles.size() - 1);
+		for (int i = 0; i < additional; i++)
+			tiles.add(last);
 		length += additional;
 	}
 }

src/main/dev/lh/Spawner.java

@@ -2,18 +2,24 @@ package dev.lh;
 
 import java.awt.Graphics;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Spawner.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class Spawner implements Updateable {
 
 	@Override
-	public void tick() {
-
+	public void nextFrame() {
 
 	}
 
 	@Override
 	public void render(Graphics g) {
 
-		
 	}
 
 }

src/main/dev/lh/Updateable.java

@@ -2,10 +2,32 @@ package dev.lh;
 
 import java.awt.Graphics;
 
+/**
+ * This interface contains everything that needs to updated regularly.<br>
+ * <br>
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Updateable.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public interface Updateable {
 
-	void tick();
+	/**
+	 * Here should the actions be implemented that are supposed to happen when a new
+	 * frame gets created.
+	 *
+	 * @since Snake 1.0
+	 */
+	void nextFrame();
 
+	/**
+	 * Renders the object.
+	 *
+	 * @param g the {@link Graphics} object that is used to render this object
+	 * @since Snake 1.0
+	 */
 	void render(Graphics g);
 
 }

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

@@ -2,8 +2,6 @@ package dev.lh.ui;
 
 import java.awt.BorderLayout;
 import java.awt.Font;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
 import java.awt.event.KeyEvent;
 
 import javax.swing.ImageIcon;
@@ -16,43 +14,27 @@ import javax.swing.border.EmptyBorder;
 
 import dev.lh.Main;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>Endscreen.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake v1.1
+ */
 public class Endscreen extends JDialog {
 
-
 	private static final long serialVersionUID = -4457484397259161063L;
 
 	private final JPanel	contentPanel	= new JPanel();
-	public static int currentIndex = 0;
-	public static boolean alreadySaved = false;
-	public static int score = 0;
-	final int goodOrBadResult = 250;
-
-
-
-
-
-	// Beginn der Hauptmethode/Erstellung des JDialogs
-	public static void main(String[] args) {
-		try {
-			Endscreen dialog = new Endscreen(score);
-			dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
-			dialog.setVisible(true);
-			dialog.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();
-		}
-	}
+	private static int		score			= 0;
+	private final int		goodOrBadResult	= 250;
 
 	/**
 	 * Create the dialog.
+	 *
+	 * @param score1 the highscore to set
 	 */
-
 	public Endscreen(int score1) {
 		setScore(score1);
 		try {
@@ -65,6 +47,17 @@ public class Endscreen extends JDialog {
 			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();
+		}
 		contentPanel.setLayout(null);
 		// JScrollPane scrollPane = new JScrollPane();
 		// scrollPane.setBounds(10, 412, 349, 238);
@@ -81,24 +74,19 @@ public class Endscreen extends JDialog {
 		// scrollPane.setViewportView(table);
 
 		// JLabel lblNewLabel = new JLabel("Highscores");
-//			lblNewLabel.setFont(new Font("Times New Roman", Font.BOLD | Font.ITALIC, 18));
+		// lblNewLabel.setFont(new Font("Times New Roman", Font.BOLD | Font.ITALIC,
+		// 18));
 		// lblNewLabel.setBounds(65, 292, 98, 41);
 		// contentPanel.add(lblNewLabel);
 
 		JButton btnNewButton = new JButton("Play again");
 		btnNewButton.setMnemonic(KeyEvent.VK_ENTER);
 
-			btnNewButton.addActionListener(new ActionListener() {// Beginn Listener new game
-				public void actionPerformed(ActionEvent e) {
-					Main.startGame();
-					setVisible(false);
-					dispose();
-				}
-			});
-//BLOß NICHT RAUSWERFEN
+		btnNewButton.addActionListener(e -> { Main.startGame(); setVisible(false); dispose(); });
+		// BLOß NICHT RAUSWERFEN
 		btnNewButton.setIconTextGap(5);
-			btnNewButton.setIcon(new ImageIcon(
-					Endscreen.class.getResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
+		btnNewButton.setIcon(new ImageIcon(ClassLoader.getSystemResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
+		// Endscreen.class.getResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
 		btnNewButton.setFont(new Font("Times New Roman", Font.PLAIN, 15));
 		btnNewButton.setBounds(85, 512, 243, 100);
 		contentPanel.add(btnNewButton);
@@ -124,7 +112,8 @@ public class Endscreen extends JDialog {
 		// JTextArea txtrBitteErstNamen = new JTextArea();
 		// txtrBitteErstNamen.setVisible(false);
 		// txtrBitteErstNamen.setBackground(UIManager.getColor("ScrollBar.foreground"));
-//			txtrBitteErstNamen.setText("Bitte erst Namen \r\neingeben und\r\ndann Speichern!!!!");
+		// txtrBitteErstNamen.setText("Bitte erst Namen \r\neingeben und\r\ndann
+		// Speichern!!!!");
 		// txtrBitteErstNamen.setBounds(468, 412, 155, 92);
 		// contentPanel.add(txtrBitteErstNamen);
 		// txtrBitteErstNamen.setVisible(false);
@@ -133,10 +122,12 @@ public class Endscreen extends JDialog {
 		// btnSaveHighscore.setMnemonic(KeyEvent.VK_ENTER);
 		// btnSaveHighscore.setIconTextGap(5);
 		// btnSaveHighscore.setIcon(
-//					new ImageIcon(Endscreen.class.getResource("/javax/swing/plaf/metal/icons/ocean/floppy.gif")));
+		// new
+		// ImageIcon(Endscreen.class.getResource("/javax/swing/plaf/metal/icons/ocean/floppy.gif")));
 		// btnSaveHighscore.setFont(new Font("Times New Roman", Font.PLAIN, 15));
 		//
-//			btnSaveHighscore.addActionListener(new ActionListener() {// Beginn Listener Save Highscore
+		// btnSaveHighscore.addActionListener(new ActionListener() {// Beginn Listener
+		// Save Highscore
 		// public void actionPerformed(ActionEvent e) {
 		// relocate(score1);
 		// writeFiles();
@@ -162,11 +153,11 @@ public class Endscreen extends JDialog {
 		JLabel		lblDasIstEin		= new JLabel("Das ist ein hervorragender Wert!");
 		lblDasIstEin.setFont(new Font("Times New Roman", Font.PLAIN, 15));
 		if (score1 >= goodOrBadResult) {
-				chckbxNewCheckBox.setIcon(new ImageIcon(Endscreen.class.getResource("/dev/lh/snake/1211548-200.png")));
+			chckbxNewCheckBox.setIcon(new ImageIcon(ClassLoader.getSystemResource("/dev/lh/snake/1211548-200.png")));
 			chckbxNewCheckBox.setBounds(300, 200, 200, 200);
 			lblDasIstEin.setBounds(10, 100, 212, 50);
 		} else {
-				chckbxNewCheckBox.setIcon(new ImageIcon(Endscreen.class.getResource("/dev/lh/snake/Try_Again.jpg")));
+			chckbxNewCheckBox.setIcon(new ImageIcon(ClassLoader.getSystemResource("/dev/lh/snake/Try_Again.jpg")));
 			chckbxNewCheckBox.setBounds(300, 200, 250, 210);
 			lblDasIstEin.setText("Das kannst du aber noch verbessern!");
 			lblDasIstEin.setBounds(10, 100, 240, 50);
@@ -174,48 +165,42 @@ public class Endscreen extends JDialog {
 		}
 		contentPanel.add(chckbxNewCheckBox);
 		contentPanel.add(lblDasIstEin);
-		} catch (Exception e) {
-			e.printStackTrace();
+		setVisible(true);
 	}
 
-	}
+	/**
+	 * @return the highscore of the current game
+	 * @since Snake 1.0
+	 */
+	public static int getScore() { return score; }
 
-	public static int getScore() {
-		return score;
-	}
-
-	public static void setScore(int score) {
-		Endscreen.score = score;
-	}
+	/**
+	 * @param score the new highscore
+	 * @since Snake 1.0
+	 */
+	public static void setScore(int score) { Endscreen.score = score; }
 	/*
 	 * public static void readInHighscoresPoints() { try { // FileReader reads text
 	 * files in the default encoding. FileReader fileReader = new
 	 * FileReader(fileNamePoints);
-	 * 
 	 * // Always wrap FileReader in BufferedReader. BufferedReader bufferedReader =
 	 * new BufferedReader(fileReader);
-	 * 
 	 * currentIndex = Integer.parseInt(bufferedReader.readLine()); for (int i = 0; i
 	 * < currentIndex; i++) { highscorePoints[i]=
 	 * Integer.parseInt(bufferedReader.readLine()); } // Always close files.
 	 * bufferedReader.close(); fileReader.close(); } catch (FileNotFoundException
 	 * ex) { System.out.println("Error 404:File '" + fileNamePoints +
 	 * "' not found");
-	 * 
 	 * } catch (IOException ex) { System.out.println("Error reading file '" +
 	 * fileNamePoints + "'"); ex.printStackTrace(); } } private void
 	 * readInHighscoresPlayers(){ try { // FileReader reads text files in the
 	 * default encoding. FileReader fileReader = new FileReader(fileNamePlayers);
-	 * 
 	 * // Always wrap FileReader in BufferedReader. BufferedReader bufferedReader =
 	 * new BufferedReader(fileReader);
-	 * 
 	 * for (int i = 0; i < currentIndex; i++) { highscorePlayers[i]=
 	 * bufferedReader.readLine(); } // Always close files. bufferedReader.close();
 	 * fileReader.close(); } catch (FileNotFoundException ex) {
 	 * System.out.println("Error 404:File '" + fileNamePlayers + "' not found");
-	 * 
-	 * 
 	 * } catch (IOException ex) { System.out.println("Error reading file '" +
 	 * fileNamePlayers + "'"); ex.printStackTrace(); } } /* private void
 	 * writeFiles() { File dateiPoints = new File("." + File.separator +
@@ -226,7 +211,6 @@ public class Endscreen extends JDialog {
 	 * catch (Exception e1) { e1.printStackTrace(); } finally { try {
 	 * bwpoints.close(); fwpoints.close(); alreadySaved = true; } catch (IOException
 	 * e2) { e2.printStackTrace(); } }
-	 * 
 	 * File dateiPlayers = new File("." + File.separator + fileNamePlayers);
 	 * FileWriter fwplayers = null; BufferedWriter bwplayers = null; try { fwplayers
 	 * = new FileWriter(dateiPlayers); bwplayers = new BufferedWriter(fwplayers);
@@ -234,20 +218,14 @@ public class Endscreen extends JDialog {
 	 * bwplayers.write(highscorePlayers[i]); } } catch (Exception e1) {
 	 * e1.printStackTrace(); } finally { try { bwplayers.close(); fwplayers.close();
 	 * alreadySaved = true; } catch (IOException e2) { e2.printStackTrace(); } }
-	 * 
-	 * 
 	 * }
-	 * 
-	 * 
 	 * /** Launch the application.
 	 */
 	/*
 	 * public void relocate(int newScore) {
-	 * 
 	 * String newPlayer = new String(tfName.getText()); if (newPlayer.equals("")) {
 	 * txtrBitteErstNamen.setVisible(true); return; } else { sortFiles(newScore,
 	 * newPlayer); } }
-	 * 
 	 * private void sortFiles(int newScore, String newPlayer) { if
 	 * (highscorePoints.length==highscorePlayers.length&&
 	 * highscorePoints.length<=30) { for(int i=0;i<highscorePoints.length;i++) {
@@ -276,7 +254,6 @@ public class Endscreen extends JDialog {
 	 * temp[i]=toCompare; for(int k=i+1;k<temp.length;k++) { int tmp2=temp[k];
 	 * temp[k]=tmp; tmp=tmp2; } arrange(temp); return; } else { temp[30]=toCompare;
 	 * arrange(temp); }
-	 * 
 	 * } } }
 	 */
 }

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

@@ -16,17 +16,30 @@ import dev.lh.FoodFactory;
 import dev.lh.Snake;
 import dev.lh.Snake.Direction;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>GameWindow.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class GameWindow extends JFrame {
 
 	private static final long	serialVersionUID	= 1L;
 	private Snake				s					= new Snake(7);
 	private FoodFactory			foodFactory			= FoodFactory.getInstance();
 
+	/**
+	 * @param title the title of the frame
+	 * @since Snake 1.0
+	 */
 	public GameWindow(String title) {
 		super(title);
 		newFood();
 		Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
 		setBounds(new Rectangle(size));
+		setLocation(0, 0);
 		setLocationRelativeTo(null);
 		setMinimumSize(size);
 		setPreferredSize(size);
@@ -35,7 +48,6 @@ public class GameWindow extends JFrame {
 		setResizable(false);
 		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
-
 		add(new JPanel() {
 
 			private static final long serialVersionUID = 1L;
@@ -58,40 +70,46 @@ public class GameWindow extends JFrame {
 				switch (e.getKeyCode()) {
 					case KeyEvent.VK_W:
 					case KeyEvent.VK_UP:
-					s.setRichtung(Direction.Up);
+						if (!s.getRichtung().equals(Direction.Down)) s.setRichtung(Direction.Up);
 						break;
 					case KeyEvent.VK_A:
 					case KeyEvent.VK_LEFT:
-					s.setRichtung(Direction.Left);
+						if (!s.getRichtung().equals(Direction.Right)) s.setRichtung(Direction.Left);
 						break;
 					case KeyEvent.VK_S:
 					case KeyEvent.VK_DOWN:
-					s.setRichtung(Direction.Down);
+						if (!s.getRichtung().equals(Direction.Up)) s.setRichtung(Direction.Down);
 						break;
 					case KeyEvent.VK_D:
 					case KeyEvent.VK_RIGHT:
-					s.setRichtung(Direction.Right);
+						if (!s.getRichtung().equals(Direction.Left)) s.setRichtung(Direction.Right);
 						break;
-				}// switch
-			}// keypressed
-		});// keylistener
-
-		Timer timer = new Timer(50, (evt) -> {
-			s.tick();
-			if(System.currentTimeMillis()>=foodFactory.getTimeOfNextFood()) newFood();
-			repaint();
+				}
+			}
 		});
+
+		Timer timer = new Timer(50,
+				(evt) -> { s.nextFrame(); if (System.currentTimeMillis() >= foodFactory.getTimeOfNextFood()) newFood(); repaint(); });
 		timer.start();
 
 		setVisible(true);
 	}
 
+	/**
+	 * Generates new food
+	 *
+	 * @since Snake 1.1
+	 */
 	public void newFood() {
 		foodFactory.generateFood();
 		foodFactory.generateFoodLocation(super.getWidth(), super.getHeight());
+		repaint();
 	}
 
-	public void close() {
-		dispose();
-	}
+	/**
+	 * Disposes this frame
+	 *
+	 * @since Snake 1.1
+	 */
+	public void close() { dispose(); }
 }

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

@@ -2,11 +2,7 @@ package dev.lh.ui;
 
 import java.awt.EventQueue;
 import java.awt.Font;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
 import java.awt.event.KeyEvent;
-import java.util.ArrayList;
-import java.util.List;
 
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
@@ -16,30 +12,38 @@ import javax.swing.border.EmptyBorder;
 
 import dev.lh.Main;
 
+/**
+ * Project: <strong>Snake</strong><br>
+ * File: <strong>StartScreen.java</strong><br>
+ * Created: <strong>11 Mar 2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Snake 1.0
+ */
 public class StartScreen extends JFrame {
 
 	private static final long	serialVersionUID	= 6055940532003735543L;
 	private JPanel				contentPane;
-	public static int currentIndex = 0;
-	public static List<String[]> combination = new ArrayList<>();
 
 	/**
-	 * Launch the application.
+	 * closes the application.
 	 */
-	public static void close() {
-		System.exit(0);
-	}
+	public static void close() { System.exit(0); }
 
+	/**
+	 * Launches Snake.
+	 *
+	 * @param args the program arguments
+	 * @since Snake 1.0
+	 */
 	public static void main(String[] args) {
-		EventQueue.invokeLater(new Runnable() {
-			public void run() {
+		EventQueue.invokeLater(() -> {
 			try {
 				StartScreen frame = new StartScreen();
 				frame.setVisible(true);
 			} catch (Exception e) {
 				e.printStackTrace();
 			}
-			}
 		});
 	}
 
@@ -87,19 +91,16 @@ public class StartScreen extends JFrame {
 
 			JButton buPlay = new JButton("Start Game");
 			buPlay.setBounds(158, 197, 190, 131);
-			buPlay.setIcon(new ImageIcon(
-					StartScreen.class.getResource("/com/sun/javafx/webkit/prism/resources/mediaPlayDisabled.png")));
+			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));
 
-			buPlay.addActionListener(new ActionListener() {
-				public void actionPerformed(ActionEvent a) {
+			buPlay.addActionListener(a -> {
 
 				Main.startGame();
 				setVisible(false);
 				dispose();
 				System.gc();
-				}
 			});
 			contentPane.setLayout(null);