ValueChanged called multiple times

Question

Hi,
I am having a problem with JTree events and wondered if someone has had the same problem. I have 3 JTrees that use the same DefaultTreeModel. Each however has its own selectionListener and willExpandListener. When a node is selected on one tree the valueChanged for all three Jtrees is called and I cannot figure out why. Its as if all three listeners are listening to all three trees, even though each JTree has a separate listener (the three listeners are the three instances of the same class however).
I can't paste the code for copyright reasons but this is how I set up the listeners in pseudo code.
DefaultTreeModel model = new DefaultTreeModel(root)
JTree tree1 = new JTree(model)
JTree tree2 = new JTree(model)
JTree tree3 = new JTree(model)
tree1.addTreeSelectionListener(new CustomTreeSelectionListener())
tree2.addTreeSelectionListener(new CustomTreeSelectionListener())
tree2.addTreeSelectionListener(new CustomTreeSelectionListener())
tree1.addTreeWillExpandListener(new CustomTreeWillExpandListener())
tree2.addTreeWillExpandListener(new CustomTreeWillExpandListener())
tree3.addTreeWillExpandListener(new CustomTreeWillExpandListener())Since all the trees have their own selection and will expand listeners, shouldn't selecting a node on one tree only call valueChanged once and not once for each tree? What am I doing wrong?
Thanks
Paul

Answer 1

Please provide more information about your source code because of I have no problem on Java 1.4 with this code:
          TreeModel model = new DefaultTreeModel(new DefaultMutableTreeNode("root"));
          JTree tree1 = new JTree(model);
          tree1.addTreeSelectionListener(new TreeSelectionListener() {
               public void valueChanged(TreeSelectionEvent e) {
                    System.out.println("tree1 selection changed");
          JTree tree2 = new JTree(model);
          tree2.addTreeSelectionListener(new TreeSelectionListener() {
               public void valueChanged(TreeSelectionEvent e) {
                    System.out.println("tree2 selection changed");
          JTree tree3 = new JTree(model);
          tree3.addTreeSelectionListener(new TreeSelectionListener() {
               public void valueChanged(TreeSelectionEvent e) {
                    System.out.println("tree3 selection changed");
          JTabbedPane tabbedPane = new JTabbedPane();
          tabbedPane.add("tree1", tree1);
          tabbedPane.add("tree2", tree2);
          tabbedPane.add("tree3", tree3);