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

Game-2/src/Game/Board.java

@@ -0,0 +1,112 @@
+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 java.util.List;
+
+import javax.swing.Timer;
+import javax.swing.JPanel;
+
+
+public class Board extends JPanel implements ActionListener {
+
+    private final int ICRAFT_X = 40;
+    private final int ICRAFT_Y = 60;
+    private final int DELAY = 10;
+    private Timer timer;
+    private SpaceShip spaceShip;
+
+    public Board() {
+
+        initBoard();
+    }
+
+    private void initBoard() {
+
+        addKeyListener(new TAdapter());
+        setBackground(Color.BLACK);
+        setFocusable(true);
+
+        spaceShip = new SpaceShip(ICRAFT_X, ICRAFT_Y);
+
+        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);
+
+        List<Missile> missiles = spaceShip.getMissiles();
+
+        for (Missile missile : missiles) {
+            
+            g2d.drawImage(missile.getImage(), missile.getX(),
+                    missile.getY(), this);
+        }
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+
+        updateMissiles();
+        updateSpaceShip();
+
+        repaint();
+    }
+
+    private void updateMissiles() {
+
+        List<Missile> missiles = spaceShip.getMissiles();
+
+        for (int i = 0; i < missiles.size(); i++) {
+
+            Missile missile = missiles.get(i);
+
+            if (missile.isVisible()) {
+
+                missile.move();
+            } else {
+
+                missiles.remove(i);
+            }
+        }
+    }
+
+    private void updateSpaceShip() {
+
+        spaceShip.move();
+    }
+
+    private class TAdapter extends KeyAdapter {
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            spaceShip.keyReleased(e);
+        }
+
+        @Override
+        public void keyPressed(KeyEvent e) {
+            spaceShip.keyPressed(e);
+        }
+    }
+}
+