AWT(Painter)

// Using class MouseMotionAdapter.
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class Painter extends JFrame
{
private int xValue = -10, yValue = -10;

public Painter()
{
super( "A simple paint program" );

getContentPane().add( new Label( "Drag the mouse to draw" ), BorderLayout.SOUTH );

addMouseMotionListener( new MouseMotionAdapter()
{
public void mouseDragged( MouseEvent e )
{
xValue = e.getX();
yValue = e.getY();
repaint();
}
} );

setSize( 300, 150 );
show();
}

public void paint( Graphics g )
{
g.fillOval( xValue, yValue, 4, 4 );
}

public static void main( String args[] )
{
Painter app = new Painter();

app.addWindowListener( new WindowAdapter()
{
public void windowClosing( WindowEvent e )
{
System.exit( 0 );
}
} );
}
}