Class Painter: Drawing with the Mouse in Java

Class Painter can be used to create small programs that make up the lines with the mouse (when the mouse-drag).

The following looks:

 

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

}