public class ButtonFrame extends JFrame
1: // Fig. 11.15: ButtonFrame.java
2: // Creating JButtons.
3: import java.awt.FlowLayout;
4: import java.awt.event.ActionListener;
5: import java.awt.event.ActionEvent;
6: import javax.swing.JFrame;
7: import javax.swing.JButton;
8: import javax.swing.Icon;
9: import javax.swing.ImageIcon;
10: import javax.swing.JOptionPane;
11:
12: public class ButtonFrame extends JFrame
13: {
14: private JButton plainJButton; // button with just text
15: private JButton fancyJButton; // button with icons
16:
17: // ButtonFrame adds JButtons to JFrame
18: public ButtonFrame()
19: {
20: super( "Testing Buttons" );
21: setLayout( new FlowLayout() ); // set frame layout
22:
23: plainJButton = new JButton( "Plain Button" ); // button with text
24: add( plainJButton ); // add plainJButton to JFrame
25:
26: Icon bug1 = new ImageIcon( getClass().getResource( "bug1.gif" ) );
27: Icon bug2 = new ImageIcon( getClass().getResource( "bug2.gif" ) );
28: fancyJButton = new JButton( "Fancy Button", bug1 ); // set image
29: fancyJButton.setRolloverIcon( bug2 ); // set rollover image
30: add( fancyJButton ); // add fancyJButton to JFrame
31:
32: // create new ButtonHandler for button event handling
33: ButtonHandler handler = new ButtonHandler();
34: fancyJButton.addActionListener( handler );
35: plainJButton.addActionListener( handler );
36: } // end ButtonFrame constructor
37:
38: // inner class for button event handling
39: private class ButtonHandler implements ActionListener
40: {
41: // handle button event
42: public void actionPerformed( ActionEvent event )
43: {
44: JOptionPane.showMessageDialog( ButtonFrame.this, String.format(
45: "You pressed: %s", event.getActionCommand() ) );
46: } // end method actionPerformed
47: } // end private inner class ButtonHandler
48: } // end class ButtonFrame
49:
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