ListTest.java

// Fig. 13.14: ListTest.java
// Selecting colors from a JList.
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;

public class ListTest extends JFrame {
    private JList colorList;
    private Container container; 
    private final String colorNames[] = { "Black", "Blue", "Cyan", "Dark Gray", "Gray", "Green", "Light Gray", "Magenta", "Orange", "Pink", "Red", "White", "Yellow" };

    private final Color colors[] = { Color.BLACK, Color.BLUE, Color.CYAN, Color.DARK_GRAY, Color.GRAY, Color.GREEN, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE, Color.PINK, Color.RED, Color.WHITE, Color.YELLOW };
    public ListTest(){
        super( "List Test" );
        container = getContentPane();
        container.setLayout( new FlowLayout() );
        colorList = new JList( colorNames );
        colorList.setVisibleRowCount( 5 );
        colorList.setSelectionMode( ListSelectionModel.SINGLE_SELECTION );
        container.add( new JScrollPane( colorList ) );
        colorList.addListSelectionListener(
             new ListSelectionListener() 
             {
                 public void valueChanged( ListSelectionEvent event ){
                     container.setBackground( 
                             colors[ colorList.getSelectedIndex() ] );
                 }
             }
        );
setSize( 350, 150 );
setVisible( true );
} // end ListTest constructor
public static void main( String args[] )
{ 
ListTest application = new ListTest();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
}// end anonymous inner class); // end call to addListSelectionListener