Java GUI >> Adding Action Listener to Button

gistfile1.java

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class MyGUI extends JFrame {
        
	JPanel jp1,jp2;
	JButton jb1,jb2;
	
	public MyGUI(){
		
		setTitle("Background Color Example");
		setSize(600,600);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		
		jp1 = new JPanel();
		jp2 = new JPanel();
		jb1 = new JButton();
		jb2 = new JButton();
		
		//Adding images onto buttons and adding buttons onto panel jp1
		jb1.setIcon(new ImageIcon("C://pn.jpg"));
		jp1.add(jb1);
		
		jb2.setIcon(new ImageIcon("C://pn.jpg"));
		jp1.add(jb2);
		
		//Adding panels to frame
		add(jp1, BorderLayout.SOUTH); //this panel contains buttons and located onto south border
		add(jp2); //this panel's background color will be changed with button clicks
		
		
		//Adding action listeners to buttons
		jb1.addActionListener(new ActionListener() {
		
			public void actionPerformed(ActionEvent e) {
				jp2.setBackground(Color.BLUE);
				
			}
		});
		
		jb2.addActionListener(new ActionListener() {
			
			public void actionPerformed(ActionEvent e) {
				jp2.setBackground(Color.GREEN);
			}
		});
		
		validate(); //if you do not validate, image will not be displayed unless you resize your window
		
	}
	
	public static void main(String [] args) {
		new MyGUI()	
	}	
}