JList - moving list of item program(1part)

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
//import javax.swing.event.*;


public class Gui extends JFrame {
    private static final long serialVersionUID = 2L;

        private JList rightlist;
        private JList leftlist;
        private JButton movebutton;

        private static String[] foods = {"bread", "ice-cream", "pastry", "pancakes", "tea","jam","honey"};

        public Gui(){
            super("Movelist program");
            setLayout(new FlowLayout());

            leftlist = new JList(foods);
            leftlist.setVisibleRowCount(3);
            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<String>();
            rightlist.setVisibleRowCount(5);
            rightlist.setFixedCellWidth(70);
            rightlist.setFixedCellHeight(15);
            rightlist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
            add(new JScrollPane(rightlist));

        }
}