/*************************************************************************

* Compilation: javac GUI.java

* Execution: java GUI

*

* A minimal Java program with a graphical user interface. The

* GUI prints out the number of times the user clicks a button.

*

* % java GUI

*

*************************************************************************/

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class GUI implements ActionListener {

private int clicks = 0;

private JLabel label = new JLabel("Number of clicks: 0 ");

private JFrame frame = new JFrame();

public GUI() {

// the clickable button

JButton button = new JButton("Click Me");

button.addActionListener(this);

// the panel with the button and text

JPanel panel = new JPanel();

panel.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30));

panel.setLayout(new GridLayout(0, 1));

panel.add(button);

panel.add(label);

// set up the frame and display it

frame.add(panel, BorderLayout.CENTER);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setTitle("GUI");

frame.pack();

frame.setVisible(true);

}

// process the button clicks

public void actionPerformed(ActionEvent e) {

clicks++;

label.setText("Number of clicks: " + clicks);

};

// create one Frame

public static void main(String[] args) {

new GUI();

}

}