Java Mouse İle Çizim Yapma

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package javaapplication2;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JFrame;
import javax.swing.JLabel;

/**
*
* @AuthoR Celal Atalar
*/
public class Cizim extends JFrame {

private int pointcount=0;

private Point point[]=new Point[10000];

public Cizim()
{
getContentPane().add(new JLabel("Çizim İşlemi İçin Sürükleme"), BorderLayout.SOUTH);
addMouseMotionListener(

new MouseMotionAdapter(){

public void mouseDragged(MouseEvent event)
{
if(pointcount<point.length)
{

point[pointcount]=event.getPoint();
pointcount++;
repaint();
}
}


} );
setSize(300,150);
setVisible(true);
}


public void paint(Graphics g) {

super.paint(g);
for(int i=0;i<point.length && point[i]!=null ;i++)
{
Color c=new Color( (int) (Math.random()*256),(int)(Math.random()*256),(int) (Math.random()*256));
g.setColor(c);
g.fillRect(point[i].x,point[i].y , 4, 4);
}
// TODO code application logic here
}

public static void main (String args[])
{
Cizim application=new Cizim();
application.setDefaultCloseOperation(JFrame.EXIT_O N_CLOSE);
}

private int random() {
throw new UnsupportedOperationException("Not yet implemented");
}

}