import java.io.*;
import java.lang.Runtime;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CircleExample extends JFrame
{
	
	public static void main ( String args[])
	{
		CircleExample circleExample = new CircleExample();
	
		WindowAdapter windowAdapter = new WindowAdapter()
		{
			public void windowClosing( WindowEvent e )
			{ 
				System.exit( 0 );
			}
		};
		
		circleExample.addWindowListener( windowAdapter );
	}
	
	public CircleExample()
	{
		setSize( 500, 600 );
		show();
	}
	
	private void drawCircle(Graphics g)
	{
		g.setColor(Color.red);
		g.fillOval(100, 100, 50, 50);
	
		g.setColor(Color.black);
		g.fillOval(100, 400, 50, 50);
	}

	public void paint(Graphics g)
	{
		drawCircle(g);
	}
	
}