Re: swing jlist, how to print out once instread of twice when selection changed

From:

"Andrew Thompson" <andrewthommo@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

3 Oct 2006 00:02:47 -0700

Message-ID:

<1159858967.398401.242710@i3g2000cwc.googlegroups.com>

John_Woo wrote:
.....

public class Test {

public static final void main( String args[] ) throws Exception {

Please do not indent code by more than 2-3 spaces for
each level when posting to usenet..

         JFrame frame = new JFrame("Test");
         frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );

     String[] items = {"A", "B", "C", "D"};

         JList list = new JList(items);

         list.addListSelectionListener(new
javax.swing.event.ListSelectionListener(){

...and try breaking lines beofre arunf 63-65 chars, as most
news readers will wrap text around that width.

public void valueChanged(javax.swing.event.ListSelectionEvent e)
{

  // basic debug statement
  // System.out.println("What is this thing called 'e'? " + e);
  System.out.println(e.getValueIsAdjusting());

1. why every time selection changed, print out twice, how to make it
print once?

Add the statement above (part of a basic debugging strategy to
find out exactly what caused the event)!

And comp.lang.java.help is a great group for people learning Java.

Andrew T.