public class LabelDemo extends JFrame implements ActionListener
1:
2: import javax.swing.*;
3: import java.awt.*;
4: import java.awt.event.*;
5:
6: /**
7: Class to demonstrate placing a label on a text field.
8: */
9: public class LabelDemo extends JFrame implements ActionListener
10: {
11: public static final int WIDTH = 300;
12: public static final int HEIGHT = 200;
13:
14: private JTextField name;
15:
16: public LabelDemo( )
17: {
18: setTitle("Name Tester");
19: setSize(WIDTH, HEIGHT);
20: addWindowListener(new WindowDestroyer( ));
21: Container content = getContentPane( );
22: content.setLayout(new GridLayout(2, 1));
23:
24: JPanel namePanel = new JPanel( );
25: namePanel.setLayout(new BorderLayout( ));
26: namePanel.setBackground(Color.LIGHT_GRAY);
27:
28: name = new JTextField(20);
29: namePanel.add(name, BorderLayout.SOUTH);
30: JLabel nameLabel = new JLabel("Enter your name here:");
31: namePanel.add(nameLabel, BorderLayout.CENTER);
32:
33: content.add(namePanel);
34:
35: JPanel buttonPanel = new JPanel( );
36: buttonPanel.setLayout(new FlowLayout( ));
37: JButton b = new JButton("Test");
38: b.addActionListener(this);
39: buttonPanel.add(b);
40: b = new JButton("Clear");
41: b.addActionListener(this);
42: buttonPanel.add(b);
43:
44: content.add(buttonPanel);
45: }
46:
47: public void actionPerformed(ActionEvent e)
48: {
49: if (e.getActionCommand( ).equals("Test"))
50: name.setText("A very good name!");
51: else if (e.getActionCommand( ).equals("Clear"))
52: name.setText("");
53: else
54: name.setText("Error in window interface.");
55: }
56:
57:
58: public static void main(String[] args)
59: {
60: LabelDemo w = new LabelDemo( );
61: w.setVisible(true);
62: }
63:
64:
65: }