Java Programming Tutorial - 70, 71 - JList

import java.awt.FlowLayout;
import java.awt.Color;
import javax.swing.JList;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.ListSelectionEvent;

class ListGUI extends JFrame {
   private JList list;
   private String colorNames[ ] = {"black", "blue", "red", "green"};
   private Color colors[ ] = {Color.BLACK, Color.BLUE, Color.RED, Color.GREEN};

   public static void main(String args[ ]) {
      ListGUI gui = new ListGUI();
      gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      gui.setSize(300, 200);
      gui.setVisible(true);
   }

   ListGUI() {
      super("background changer");
      setLayout(new FlowLayout());

      list = new JList(colorNames);
      list.setVisibleRowCount(colorNames.length);
      list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
      add(new JScrollPane(list));
      getContentPane().setBackground(colors[0]);

      list.addListSelectionListener(
         new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent event) {
               getContentPane().setBackground(colors[list.getSelectedIndex()]);
            }
         }
      );
   }
}