Java JFrame create custom shaped window

import java.awt.BorderLayout; 
import java.awt.geom.Path2D; 
import java.awt.geom.Ellipse2D; 
import java.awt.geom.Rectangle2D; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.SwingUtilities; 

public class Main extends JFrame { 
    private JButton closeButton = new JButton("Close"); 

    public Main() { 

        // Make sure the frame is undecorated 
        this.setUndecorated(true); 

        this.setDefaultCloseOperation(EXIT_ON_CLOSE); 
        this.setSize(200, 200); 

        // Create a shape with an ellipse placed over a rectangle 
        Ellipse2D.Double ellipse = new Ellipse2D.Double(0, 0, 200, 100); 
        Rectangle2D.Double rect = new Rectangle2D.Double(0, 100, 200, 200); 

        Path2D path = new Path2D.Double(); 
        path.append(rect, true); //  w  w  w. j ava  2s .c o m
        path.append(ellipse, true); 
        this.setShape(path); 

        this.add(closeButton, BorderLayout.SOUTH); 
        closeButton.addActionListener(e -> System.exit(0)); 
    } 

    public static void main(String[] args) { 
        SwingUtilities.invokeLater(() -> { 
            Main frame = new Main(); 
            frame.setLocationRelativeTo(null); 
            frame.setVisible(true); 
        }); 
    } 
}