Swing II - Absolute Java - page 1027

Display 18.4 Using Icons (part 1 of 2)

1 import javax.swing.JFrame;
2 import javax.swing.JPanel;
3 import javax.swing.JTextField;
4 import javax.swing.ImageIcon;
5 import java.awt.BorderLayout;
6 import java.awt.FlowLayout;
7 import java.awt.Color;
8 import javax.swing.JLabel;
9 import javax.swing.JButton;
10 import java.awt.event.ActionListener;
11 import java.awt.event.ActionEvent;

12 public class IconDemo extends JFrame implements ActionListener
13 {
14

public static final int WIDTH = 500;

15 public static final int HEIGHT = 200;

16 public static final int TEXT_FIELD_SIZE = 30;

17 private JTextField message;
18 public static void main(String[] args)
19 {
20 IconDemo iconGui = new IconDemo();
21 iconGui.setVisible(true);
22 }

23 public IconDemo()
24 {
25 super ("Icon Demonstration");
26 setSize(WIDTH, HEIGHT);
27 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

28 setBackground(Color.WHITE);
29 setLayout( new BorderLayout());

30 JLabel dukeLabel = new JLabel("Mood check");
31 ImageIcon dukeIcon = new ImageIcon("duke_waving.gif");
32 dukeLabel.setIcon(dukeIcon);
33 add(dukeLabel, BorderLayout.NORTH);

34 JPanel buttonPanel = new JPanel();
35 buttonPanel.setLayout( new FlowLayout());
36 JButton happyButton = new JButton("Happy");
37 ImageIcon happyIcon = new ImageIcon("smiley.gif");
38 happyButton.setIcon(happyIcon);
39 happyButton.addActionListener( this );
40 buttonPanel.add(happyButton);
41 JButton sadButton = new JButton("Sad");
42 ImageIcon sadIcon = new ImageIcon("sad.gif");
43 sadButton.setIcon(sadIcon);
44 sadButton.addActionListener( this );

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