MyTreeModelListener.java

package gui;

import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;

class MyTreeModelListener implements TreeModelListener {
    public void treeNodesChanged(TreeModelEvent e) {
        DefaultMutableTreeNode node;
        node = (DefaultMutableTreeNode)
                 (e.getTreePath().getLastPathComponent());

        /*
         * If the event lists children, then the changed
         * node is the child of the node we have already
         * gotten.  Otherwise, the changed node and the
         * specified node are the same.
         */
        try {
            int index = e.getChildIndices()[0];
            node = (DefaultMutableTreeNode)
                   (node.getChildAt(index));
        } catch (NullPointerException exc) {}

        //System.out.println("The user has finished editing the node.");
        //System.out.println("New value: " + node.getUserObject());
    }
    public void treeNodesInserted(TreeModelEvent e) {
        //System.out.println("Node inserted.");
    }
    public void treeNodesRemoved(TreeModelEvent e) {
        //System.out.println("Node removed.");
    }
    public void treeStructureChanged(TreeModelEvent e) {
        //System.out.println("Structure changed.");
    }
}