01: import java.awt.*;
02: import java.awt.event.*;
03: import javax.swing.*;
04: 
05: public class ActionTester
06: {
07:    public static void main(String[] args)
08:    {
09:       JFrame frame = new JFrame();
10: 
11:       final int FIELD_WIDTH = 20;
12:       final JTextField textField = new JTextField(FIELD_WIDTH);
13:       textField.setText("Click a button!");
14: 
15:       JButton helloButton = new JButton("Say Hello");
16: 
17:       helloButton.addActionListener(new
18:          ActionListener()
19:          {
20:             public void actionPerformed(ActionEvent event)
21:             {
22:                textField.setText("Hello, World!");
23:             }
24:          });
25: 
26:       JButton goodbyeButton = new JButton("Say Goodbye");
27: 
28:       goodbyeButton.addActionListener(new
29:          ActionListener()
30:          {
31:             public void actionPerformed(ActionEvent event)
32:             {
33:                textField.setText("Goodbye, World!");
34:             }
35:          });
36: 
37:       frame.setLayout(new FlowLayout());
38: 
39:       frame.add(helloButton);
40:       frame.add(goodbyeButton);
41:       frame.add(textField);
42: 
43:       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
44:       frame.pack();
45:       frame.setVisible(true);
46:    }
47: }