Swing II - Java - page 971

You can add an icon to a label with the method setIcon , as follows: setIcon

JLabel dukeLabel = new JLabel("Mood check");
dukeLabel.setIcon(dukeIcon);

Alternatively, you give the icon as an argument to the JLabel constructor, as follows:

JLabel dukeLabel = new JLabel(dukeIcon);

You can leave the label as created and it will have an icon but no text, or you can add
text with the method setText , as follows:

setText

dukeLabel.setText("Mood check");

Icons and text may be added to JButton s and JMenuItem s in the same way as they
are added to a JLabel . For example, the following is taken from Display 18.4, which is
a demonstration of the use of icons:

JButton happyButton = new JButton("Happy");
ImageIcon happyIcon = new ImageIcon("smiley.gif");
happyButton.setIcon(happyIcon);

Display 18.4 Using Icons (part 1 of 3)

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;

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