14) Write a Java Swing program that changes background color of JList using ListSelectionEvent.

source file name:  ListSelectEvent2.java

import java.awt.*;  

import java.awt.event.*;  

import javax.swing.*;

import javax.swing.event.*;

class ListSelectEvent2 extends JFrame implements ListSelectionListener

{

JList ls;

Object  ct;

JLabel lbtxt;

public ListSelectEvent2()

{

FlowLayout fl=new FlowLayout();

setLayout(fl);

JLabel lb=new JLabel("select the color :");

lbtxt=new JLabel();

String cols[]= { "blue","green","yellow",

                         "pink","red"};

ls=new JList(cols);

JScrollPane sp=new JScrollPane(ls);

add(lb);

add(sp);

ls.addListSelectionListener(this);

add(lbtxt);

}

public void valueChanged(ListSelectionEvent lse)

{

String cls=ls.getSelectedValue().toString();

Color col=null;

System.out.println("selected day "+ls.getSelectedValue());

if(cls.equals("blue"))

col=Color.blue;

if(cls.equals("pink"))

col=Color.pink;

if(cls.equals("red"))

col=Color.red;

if(cls.equals("green"))

col=Color.green;

if(cls.equals("yellow"))

col=Color.yellow;

ls.setBackground(col);

}

public static void main(String as[])

{

ListSelectEvent2 f=new ListSelectEvent2();

f.setTitle("list selection event program");

f.setSize(300,300);

f.setVisible(true);

}

}  

output: