Java Programming Tutorial - 72, 73 - Multiple Selection List

import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.JList;
import javax.swing.ListSelectionModel;

class MultiGUI extends JFrame {
   private JList leftList;
   private JList rightList;
   private JButton moveButton;
   private String foods[ ] = {"fish", "beacon", "chicken", "ham", "egg", "milk", "apple"};

   public static void main(String args[ ]) {
      MultiGUI gui = new MultiGUI();
      gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      gui.setSize(350, 150);
      gui.setVisible(true);
   }

   MultiGUI() {
      super("super duper mover");
      setLayout(new FlowLayout());

      leftList = new JList(foods);
      leftList.setVisibleRowCount(5);
      leftList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
      add(new JScrollPane(leftList));

      moveButton = new JButton("move -->");
      moveButton.addActionListener(
         new ActionListener() {
            public void actionPerformed(ActionEvent event) {
               rightList.setListData(leftList.getSelectedValues());
            }
         }
      );
      add(moveButton);
      rightList = new JList();
      rightList.setVisibleRowCount(5);
      rightList.setFixedCellHeight(15);
      rightList.setFixedCellWidth(100);
      add(new JScrollPane(rightList));
   }
}