How can I put a CASE SWITCH on a JList?

Posted on 2008-10-21
Last Modified: 2012-05-05
How can I put a case switch on JList selection entered?  

case one:
case two:
case three:
case four:
case five:
import java.awt.*;

    import java.awt.event.*;

    import javax.swing.*;

    public class Lister {

      public static void main(String[] args) {

        JFrame frame = new JFrame("Lister v1.0");

        String [] items = { "one", "two", "three", "four", "five" };

        final JList list = new JList(items);

        // create a button; when it's pressed, print out

        // the selection in the list

        JButton button = new JButton("Per favore");

        button.addActionListener(new ActionListener() {

          public void actionPerformed(ActionEvent ae) {

            Object[] selection = list.getSelectedValues();


            for ( Object o : selection )

              System.out.println( o );



        // put the controls the content pane

        Container c = frame.getContentPane();  // unnecessary  in 5.0+

        JPanel comboPanel = new JPanel();

        c.add(new JScrollPane(list), BorderLayout.CENTER);

        c.add(button, BorderLayout.SOUTH);

        frame.setSize(200, 200);

        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );




Open in new window

Question by:glynco

Accepted Solution

MatthiasVance earned 500 total points
ID: 22765527
First of all you should change the selection mode of your control, then you can use list.getSelectedValue(). Note that you cannot use a string in a switch, so you have to think of something else to do (maybe a private class that holds the string and the numerical value of it, and then switch() the numerical value).

Kind regards,

Matthias Vance
// Private Value class

private class Value {

    		public String text;

    		public int num;

    		Value(String text, int num) {

    			this.text = text;

    			this.num = num;


    		public String toString(){

				return text;



// Change selection mode


// Get selected value

Value selection = (Value)list.getSelectedValue();

            switch(selection.num) {

            	case 1:

            		System.out.println("You selected one!");



Open in new window


Expert Comment

ID: 22765826
You may use Enum instead of String if you want to use switch-case here.

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Java / Linux and Regular Expressions 11 71
custom annotations 9 32
Basic Java Case or If-Else statement... 3 43
varialbe initialization 11 30
For customizing the look of your lightweight component and making it look lucid like it was made of glass. Or: how to make your component more Apple-ish ;) This tip assumes your component to be of rectangular shape and completely opaque. (COD…
This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now