Re: jlist

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 25 Jan 2008 09:36:34 -0800

Message-ID:

<4799e6ab$0$31502$b9f67a60@news.newsdemon.com>

dario.8282@hotmail.it wrote:

i have a jlist; i put in a vector of string

Vector v_righe = new Vector();
JList list_righe = new JList(v_righe);

i select an element of the jlist with the mouse
i would like to deselect the element push a button...

i call
list_righe.clearSelection();

...that cause the exception:

Exception in thread "AWT-EventQueue-1"
java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.Vector.get(Vector.java:696)

i have tried to do these controls...

if(v_righe.size()>0){
if(!list_righe.isSelectionEmpty())
list_righe.clearSelection();
}

but it's the same...
what's the problem?
thank's!

It works just fine for me.

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

public class test2 {
     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 Vector v = new Vector();
                 v.add("One");
                 v.add("Two");
                 v.add("Three");
                 final JList l = new JList(v);
                 f.add(l,BorderLayout.CENTER);
                 JButton b = new JButton("Clear Selection");
                 b.addActionListener(new ActionListener() {
                     public void actionPerformed(ActionEvent ae) {
                         l.clearSelection();
                     }
                 });
                 f.add(b,BorderLayout.SOUTH);
                 f.pack();
                 f.setVisible(true);
             }
         });
     }
}

--

Knute Johnson
email s/nospam/knute/

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