import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;

public class Foo extends JFrame {

	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JPanel jPanel = null;

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				Foo thisClass = new Foo();
				thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				thisClass.setVisible(true);
			}
		});
	}
	
	/**
	 * This is the default constructor
	 */
	public Foo() {
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		this.setSize(300, 200);
		this.setContentPane(getJContentPane());
		this.setTitle("JFrame");
	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
			jContentPane.add(getJPanel(), BorderLayout.CENTER);
		}
		return jContentPane;
	}

	/**
	 * This method initializes jPanel	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getJPanel() {
		if (jPanel == null) {
			jPanel = new JPanel() {
				protected  void paintComponent(Graphics g) {
				    super.paintComponent(g);
				    
				    Graphics2D g2 = (Graphics2D) g;
				    			    
				    Insets insets = getInsets();
				    // int w = getWidth() - insets.left - insets.right;
				    int h = getHeight() - insets.top - insets.bottom;
				    
				    AffineTransform oldAT = g2.getTransform();
				    try {
				    	//Move the origin to bottom-left, flip y axis
				    	g2.scale(1.0, -1.0);
					    g2.translate(0, -h - insets.top);
					    
					    int xpoints[] = { 20, 30, 30, 35, 25, 15, 20 };
					    int ypoints[] = { 10, 10, 30, 30, 45, 30, 30 };
					    int npoints = 7;
					    g2.fillPolygon(xpoints, ypoints, npoints);
				    }
				    finally {
					  //restore
					  g2.setTransform(oldAT);
				    }
				}
			};
			
			jPanel.setLayout(new GridBagLayout());
		}
		return jPanel;
	}

}