// Fig. 12.13: ComboBoxTest.java // Using a JComboBox to select an image to display. import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ComboBoxTest extends JFrame { private JComboBox images; private JLabel label; private String names[] = { "bug1.gif", "bug2.gif", "travelbug.gif", "buganim.gif" }; private Icon icons[] = { new ImageIcon( names[ 0 ] ), new ImageIcon( names[ 1 ] ), new ImageIcon( names[ 2 ] ), new ImageIcon( names[ 3 ] ) }; public ComboBoxTest() { super( "Testing JComboBox" ); Container c = getContentPane(); c.setLayout( new FlowLayout() ); images = new JComboBox( names ); images.setMaximumRowCount( 3 ); images.addItemListener( new ItemListener() { public void itemStateChanged( ItemEvent e ) { label.setIcon( icons[ images.getSelectedIndex() ] ); } } ); c.add( images ); label = new JLabel( icons[ 0 ] ); c.add( label ); setSize( 350, 100 ); show(); } public static void main( String args[] ) { ComboBoxTest app = new ComboBoxTest(); app.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } } /************************************************************************** * (C) Copyright 1999 by Deitel & Associates, Inc. and Prentice Hall. * * All Rights Reserved. * * * * DISCLAIMER: The authors and publisher of this book have used their * * best efforts in preparing the book. These efforts include the * * development, research, and testing of the theories and programs * * to determine their effectiveness. The authors and publisher make * * no warranty of any kind, expressed or implied, with regard to these * * programs or to the documentation contained in these books. The authors * * and publisher shall not be liable in any event for incidental or * * consequential damages in connection with, or arising out of, the * * furnishing, performance, or use of these programs. * *************************************************************************/