Menggambar dengan Mouse di Java

Class Painter dapat digunakan untuk membuat program kecil yang membentuk garis dengan mouse (saat mouse di-drag).

Berikut ini program lengkapnya:

01	import java.awt.*;
02	import java.awt.event.*;

03	import javax.swing.*;
04

05	public class Painter extends JFrame {
06	private int pointCount = 0;

07	private Point points[] = new Point[1000];
08

09	public Painter () {
10	super ("Program menggambar sederhana");

11
12	getContentPane().add(new JLabel("Drag mouse to draw"), BorderLayout.SOUTH);

13
14	addMouseMotionListener (

15	new MouseMotionAdapter() {
16	public void mouseDragged (MouseEvent e) {

17	if (pointCount < points.length) {
18	points[pointCount] = e.getPoint();

19	++pointCount;
20	repaint();

21	}
22	}

23	} //end of anonymous class
24	); //end method addMotionListener

25
26	setSize (300,150);

27	setLocationRelativeTo(null);
28	setVisible(true);

29	}
30

31	public void paint (Graphics g) {
32	super.paint(g);

33	for (int i = 0; i < points.length && points[i] != null; i++) {
34	g.setColor(Color.red);

35	g.fillOval (points[i].x, points[i].y, 4,4);
36	}

37	}
38

39	public static void main (String args[]) {
40	Painter test = new Painter();

41	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
42	}

43

}

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