Java Basic(70)-JList Program

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

public class Gui extends JFrame{

private JList list;

private static String[] colornames = {"black","blue","red","white"};

private static Color[] colors = {Color.BLACK,Color.BLUE,Color.RED,Color.WHITE};

public Gui(){

super("title");

setLayout(new FlowLayout());

list = new JList(colornames);

list.setVisibleRowCount(4);

list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

add(new JScrollPane(list));

list.addListSelectionListener(

new ListSelectionListener(){

public void valueChanged(ListSelectionEvent event){

getContentPane().setBackground(colors[list.getSelectedIndex()]);

}

}

);

}

}

不要改變apples.java和運行：（你可以從這個名單選擇)