Java Programming Tutorial - 63 - JButton Final Program

import javax.swing.JFrame;

public class apples {
   public static void main(String[] args){
      Gui go = new Gui();
      go.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      go.setSize(300,200);
      go.setVisible(true);

   }

}

import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;

public class Gui extends JFrame{

   private JButton reg;
   private JButton custom;

   public Gui(){
      super("The title");
      setLayout(new FlowLayout());

      reg = new JButton("reg Button");
      add(reg);

      Icon b = new ImageIcon(getClass().getResource("a.png"));
      Icon x = new ImageIcon(getClass().getResource("x.png"));
      custom = new JButton("Custom", b);
      custom.setRolloverIcon(x);
      add(custom);

      HandlerClass handler = new HandlerClass();
      reg.addActionListener(handler);
      custom.addActionListener(handler);
   }

   private class HandlerClass implements ActionListener{
      public void actionPerformed(ActionEvent event){
         JOptionPane.showMessageDialog(null, String.format("%s",

event.getActionCommand()));
      }
   }
}