Create a bouncing face in java

Problem:

Create a bouncing face.

Output:

Solution:

//****************BouncingFaceFrame.java******************/
import javax.swing.JFrame;

public class BouncingFaceFrame {

	
	public static void main(String[] args) {
		
		JFrame frame = new JFrame("Happy Face");

		frame.getContentPane().add(new BouncingFacePanel());
		frame.pack();
		frame.setVisible(true);
		
	}

}
//****************BouncingFacePanel.java******************.
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.Timer;

public class BouncingFacePanel extends JPanel{

	
	private final int WIDTH = 300, HEIGHT = 300;
	private final int DELAY = 20, IMAGE_SIZE = 35;
	
	private ImageIcon icon;
	private int x, y, moveX, moveY;
	private Timer timer;
	
	public BouncingFacePanel() {
			timer = new Timer(DELAY, new ReboundListener());
			
			icon = new ImageIcon("images.jpg");
			
			x = 5; y=40;
			moveX = moveY = 3;
			
			setBackground(Color.WHITE);
			setPreferredSize(new Dimension(WIDTH, HEIGHT));
			timer.start();
			timer.addActionListener(new ReboundListener());
	
	}
	
	@Override
	protected void paintComponent(Graphics g) {
			super.paintComponent(g);
			icon.paintIcon(this, g, x, y);
	}
	
	private class ReboundListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent arg0) {
			
			x += moveX;
			y += moveY;
			
			if ( x <= 0 || x >= (WIDTH-IMAGE_SIZE)) moveX *= -1;
			if ( y <= 0 || y >= (WIDTH-IMAGE_SIZE)) moveY *= -1;	
		
		repaint();
		}
			
	}
}