public void checkCollisions() {
Rectangle r3 = craft.getBounds();
for (int j = 0; j < aliens.size(); j++) {
Alien a = (Alien) aliens.get(j);
Rectangle r2 = a.getBounds();
if (r3.intersects(r2)) {
craft.setVisible(false);
a.setVisible(false);
ingame = false;
}
}
ArrayList ms = craft.getMissiles();
for (int i = 0; i < ms.size(); i++) {
Missile m = (Missile) ms.get(i);
Rectangle r1 = m.getBounds();
for (int j = 0; j < aliens.size(); j++) {
Alien a = (Alien) aliens.get(j);
Rectangle r2 = a.getBounds();
if (r1.intersects(r2)) {
m.setVisible(false);
a.setVisible(false);
}
}
}
}
private void doDrawing(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.drawImage(craft.getImage(), craft.getX(), craft.getY(), this);
ArrayList<Missile> ms = craft.getMissiles();
for (Missile missible : ms) {
g2d.drawImage(missible.getImage(), missible.getX(), missible.getY(), this);
}
}
private void updateMissible() {
ArrayList ms = craft.getMissiles();
for (int i = 0; i < ms.size(); i++) {
Missile m = (Missile) ms.get(i);
if (m.isVisible()) {
m.move();
} else {
ms.remove(i);
}
}
}
public void paint(Graphics g) {
super.paint(g);
if (ingame) {
Graphics2D g2d = (Graphics2D) g;
if (craft.isVisible()) g2d.drawImage(craft.getImage(), craft.getX(), craft.getY(), this);
ArrayList ms = craft.getMissiles();
for (int i = 0; i < ms.size(); i++) {
Missile m = (Missile) ms.get(i);
g2d.drawImage(m.getImage(), m.getX(), m.getY(), this);
}
for (int i = 0; i < aliens.size(); i++) {
Alien a = (Alien) aliens.get(i);
if (a.isVisible()) g2d.drawImage(a.getImage(), a.getX(), a.getY(), this);
}
g2d.setColor(Color.WHITE);
g2d.drawString("Aliens left: " + aliens.size(), 5, 15);
} else {
String msg = "Game Over";
Font small = new Font("Helvetica", Font.BOLD, 14);
FontMetrics metr = this.getFontMetrics(small);
g.setColor(Color.white);
g.setFont(small);
g.drawString(msg, (B_WIDTH - metr.stringWidth(msg)) / 2, B_HEIGHT / 2);
}
Toolkit.getDefaultToolkit().sync();
g.dispose();
}
public void actionPerformed(ActionEvent e) {
if (aliens.size() == 0) {
ingame = false;
}
ArrayList ms = craft.getMissiles();
for (int i = 0; i < ms.size(); i++) {
Missile m = (Missile) ms.get(i);
if (m.isVisible()) m.move();
else ms.remove(i);
}
for (int i = 0; i < aliens.size(); i++) {
Alien a = (Alien) aliens.get(i);
if (a.isVisible()) a.move();
else aliens.remove(i);
}
craft.move();
checkCollisions();
repaint();
}
