Menggambar dengan Mouse di Java

HASILNYA.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Painter extends JFrame {
private int pointCount = 0;
private Point points[] = new Point[1000];
public Painter () {
super ("Program menggambar sederhana");
getContentPane().add(new JLabel("Drag mouse to draw"), BorderLayout.SOUTH);
addMouseMotionListener (
new MouseMotionAdapter() {
public void mouseDragged (MouseEvent e) {
if (pointCount < points.length) {
points[pointCount] = e.getPoint();
++pointCount;
repaint();
}
}
} //end of anonymous class
); //end method addMotionListener
setSize (300,150);
setLocationRelativeTo(null);
setVisible(true);
}
public void paint (Graphics g) {
super.paint(g);
for (int i = 0; i < points.length && points[i] != null; i++) {
g.setColor(Color.red);
g.fillOval (points[i].x, points[i].y, 4,4);
}
}
public static void main (String args[]) {
Painter test = new Painter();
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}