Session: Scheduling. just a treat: a small sprite game

Game-1/src/Game/Board.java

@@ -0,0 +1,82 @@
+package Game;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Toolkit;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+
+import javax.swing.Timer;
+import javax.swing.JPanel;
+
+
+public class Board extends JPanel implements ActionListener {
+
+    private Timer timer;
+    private SpaceShip spaceShip;
+    private final int DELAY = 10;
+
+    public Board() {
+
+        initBoard();
+    }
+
+    private void initBoard() {
+
+        addKeyListener(new TAdapter());
+        setBackground(Color.black);
+        setFocusable(true);
+
+        spaceShip = new SpaceShip();
+
+        timer = new Timer(DELAY, this);
+        timer.start();
+    }
+
+    @Override
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+
+        doDrawing(g);
+        
+        Toolkit.getDefaultToolkit().sync();
+    }
+    
+    private void doDrawing(Graphics g) {
+        
+        Graphics2D g2d = (Graphics2D) g;
+
+        g2d.drawImage(spaceShip.getImage(), spaceShip.getX(), 
+            spaceShip.getY(), this);
+    }
+    
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        
+        step();
+    }
+    
+    private void step() {
+        
+        spaceShip.move();
+        
+        repaint(spaceShip.getX()-1, spaceShip.getY()-1, 
+                spaceShip.getWidth()+2, spaceShip.getHeight()+2);     
+    }    
+
+    private class TAdapter extends KeyAdapter {
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            spaceShip.keyReleased(e);
+        }
+
+        @Override
+        public void keyPressed(KeyEvent e) {
+            spaceShip.keyPressed(e);
+        }
+    }
+}

Game-1/src/Game/SpaceShip.java

@@ -0,0 +1,104 @@
+package Game;
+
+import java.awt.Image;
+import java.awt.event.KeyEvent;
+
+import javax.swing.ImageIcon;
+
+public class SpaceShip {
+
+    private int dx;
+    private int dy;
+    private int x = 40;
+    private int y = 60;
+    private int w;
+    private int h;
+    private Image image;
+
+    public SpaceShip() {
+
+        loadImage();
+    }
+
+    private void loadImage() {
+        
+        ImageIcon ii = new ImageIcon("src/resources/spaceship.png");
+        image = ii.getImage(); 
+        
+        w = image.getWidth(null);
+        h = image.getHeight(null);
+    }
+
+    public void move() {
+        
+        x += dx;
+        y += dy;
+    }
+
+    public int getX() {
+        
+        return x;
+    }
+
+    public int getY() {
+        
+        return y;
+    }
+    
+    public int getWidth() {
+        
+        return w;
+    }
+    
+    public int getHeight() {
+        
+        return h;
+    }    
+
+    public Image getImage() {
+        
+        return image;
+    }
+
+    public void keyPressed(KeyEvent e) {
+
+        int key = e.getKeyCode();
+
+        if (key == KeyEvent.VK_LEFT) {
+            dx = -2;
+        }
+
+        if (key == KeyEvent.VK_RIGHT) {
+            dx = 2;
+        }
+
+        if (key == KeyEvent.VK_UP) {
+            dy = -2;
+        }
+
+        if (key == KeyEvent.VK_DOWN) {
+            dy = 2;
+        }
+    }
+
+    public void keyReleased(KeyEvent e) {
+        
+        int key = e.getKeyCode();
+
+        if (key == KeyEvent.VK_LEFT) {
+            dx = 0;
+        }
+
+        if (key == KeyEvent.VK_RIGHT) {
+            dx = 0;
+        }
+
+        if (key == KeyEvent.VK_UP) {
+            dy = 0;
+        }
+
+        if (key == KeyEvent.VK_DOWN) {
+            dy = 0;
+        }
+    }
+}

Game-1/src/Game/TheGame.java

@@ -0,0 +1,33 @@
+package Game;
+
+import java.awt.EventQueue;
+import javax.swing.JFrame;
+
+public class TheGame extends JFrame {
+
+    public TheGame() {
+        
+        initUI();
+    }
+    
+    private void initUI() {
+
+        add(new Board());
+
+        setTitle("Moving sprite");
+        setSize(800, 800);
+        
+        setLocationRelativeTo(null);
+        setResizable(false);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+    public static void main(String[] args) {
+
+        EventQueue.invokeLater(() -> {
+        	TheGame ex = new TheGame();
+            ex.setVisible(true);
+        });
+    }
+
+}