Program Button

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

class DemoButton implements ActionListener {   
  public JLabel label;
  public JButton btn1, btn2;
   
  public DemoButton() {   
    ImageIcon icon = new ImageIcon("images/tunjuk.jpg");
       
    label = new JLabel("Belum ada button yang diklik");
    label.setLocation(60, 40);
    label.setSize(label.getPreferredSize());
       
    btn1 = new JButton("Button #1");       
    btn1.setLocation(40, 70);
    btn1.setSize(btn1.getPreferredSize());
    btn1.addActionListener(this);
       
    btn2 = new JButton("Button #2", icon);
    btn2.setLocation(135, 70);
    btn2.setSize(btn2.getPreferredSize());
    btn2.addActionListener(this);
  }   
   
  public void createAndShowGUI() {
    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame("Demo JButton");
    frame.setLayout(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(label, BorderLayout.CENTER);
    frame.getContentPane().add(btn1);
    frame.getContentPane().add(btn2);
    frame.setBounds(0, 0, 300, 200);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
   
  public void actionPerformed(ActionEvent event) {
    if (event.getSource() == btn1) {
      label.setText("Button #1 telah diklik");
    }    else if (event.getSource() == btn2) {
      label.setText("Button #2 telah diklik");
    }
  }
   
  public static void main(String[] args) {       
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        DemoFrame app = new DemoFrame();
        app.createAndShowGUI();
      }
    });       
  }   
}