JFrame -ベン図みたいなの表示するやつ

package JFRAME;
 
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
 
import javax.swing.JFrame;
 
public class OvalSample extends JFrame {
	private static final long serialVersionUID = 1L;
 
	public OvalSample() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
 
	public void paint(Graphics g) {
		super.paint(g);
		Graphics2D g2 = (Graphics2D)g;
		Ellipse2D ellipse = new Ellipse2D.Double(20, 50, 100, 100);
		Ellipse2D ellipse2 = new Ellipse2D.Double(80, 50, 100, 100);
		g2.draw(ellipse);
		g2.draw(ellipse2);
	}
 
	public static void main(String[] args) {
		JFrame f = new OvalSample();
		f.setTitle("title");
		f.setSize(200, 200);
		f.setVisible(true);
	}
}