import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;   //Only import the outer class.
import javax.swing.JComponent;

public class EllipseComponent extends JComponent
{
	public void paintComponent(Graphics g) 
	{
            //RecoverGraphics2D
	    Graphics2D g2 = (Graphics2D) g;

	    //Ellipse2D.Double is an inner class of Ellipse2D.
            Ellipse2D.Double ellipse = new Ellipse2D.Double(5, 10, 100 ,30);
	    g2.draw(ellipse);

//Circle:  Ellipse2D.Double circle = new Ellipse2D.Double(5, 10, 100 ,100);
//          g2.draw(circle);

}

}

import javax.swing.JFrame;

public class EllipseViewer
{
	public static void main(String[] args)
	{
	    JFrame frame = new JFrame();
	    frame.setSize(300, 400);
	    frame.setTitle("Ellipse");
	    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	    EllipseComponent component = new EllipseComponent();
	    frame.add(component);

	    frame.setVisible(true);

	}
}

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import javax.swing.JComponent;

public class EllipseComponent extends JComponent
{
	public void paintComponent(Graphics g) 
	{
            //RecoverGraphics2D
	    Graphics2D g2 = (Graphics2D) g;
            Ellipse2D.Double ellipse = new Ellipse2D.Double(5, 10, 100 ,100);
	    g2.setColor(Color.RED);
	    g2.draw(ellipse);
	}
}

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import javax.swing.JComponent;

public class EllipseComponent extends JComponent
{
	public void paintComponent(Graphics g) 
	{
            //RecoverGraphics2D
	    Graphics2D g2 = (Graphics2D) g;
            Ellipse2D.Double ellipse = new Ellipse2D.Double(5, 10, 100 ,100);
	    g2.setColor(Color.RED);
 	    g2.draw(ellipse);
	    g2.setColor(Color.YELLOW);
            g2.fill(ellipse);
	}
}