11. JList - Multiple selection - 2 lists

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

public class Gui extends JFrame{

    // Variables
    private JList leftlist;
    private JList rightlist;
    private JButton movebutton;
    private static String[] foods = {"bacon", "wings", "ham", "beef", "more bacon"};


    // Constructor
    public Gui(){

        super("JFrame's title");
        setLayout(new FlowLayout());
        leftlist = new JList(foods);
        leftlist.setVisibleRowCount(3);     // 3 items seen by default
        leftlist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        add(new JScrollPane(leftlist));
        // add(leftlist);

        movebutton = new JButton("Move --->");
        movebutton.addActionListener(
                new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent event) {
                        rightlist.setListData(leftlist.getSelectedValues());
                    }
                }
        );
        add(movebutton);

        rightlist = new JList();
        rightlist.setVisibleRowCount(3);
        rightlist.setFixedCellHeight(15);
        rightlist.setFixedCellWidth(100);
        rightlist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        add(new JScrollPane(rightlist));

    }

    // Main Function
    public static void main(String[] args){
        Gui gui = new Gui();
        gui.setDefaultCloseOperation(EXIT_ON_CLOSE);
        gui.setSize(600, 600);
        gui.setVisible(true);
    }

}