import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class Gui extends JFrame {
    private JList leftlist;
    private JList rightlist;
    private JButton movebutton;
    private static String[] foods = {"Bacon", "Apples", "Wings", "Tuna", "Ham", "Beef"};

    public Gui() {
        super("Moving Food");
        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();
        rightlist.setVisibleRowCount(3);
        rightlist.setFixedCellWidth(100);
        rightlist.setFixedCellHeight(15);
        rightlist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        add(new JScrollPane(rightlist));
    }
}