Sample coding:

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.tree.*;

import java.util.*;

public class Test3 extends JFrame {

JTree jt1 = new JTree(), jt2 = new JTree(new DefaultMutableTreeNode());

public Test3() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container content = getContentPane();

Vector v = new Vector();

Enumeration e = ((DefaultMutableTreeNode)((DefaultTreeModel)jt1.getModel()).getRoot()).breadthFirstEnumeration();

while (e.hasMoreElements()) v.add(e.nextElement());

final JList jl = new JList(v);

content.add(new JScrollPane(jl), BorderLayout.WEST);

jl.addListSelectionListener(new ListSelectionListener() {

public void valueChanged(ListSelectionEvent lse) {

((DefaultTreeModel)jt2.getModel()).setRoot((TreeNode)jl.getSelectedValue());

}

});

JSplitPane jsp = new JSplitPane(JSplitPane.VERTICAL_SPLIT,new JScrollPane(jt1),

new JScrollPane(jt2));

jsp.setResizeWeight(0.5);

content.add(jsp);

jt1.addTreeSelectionListener(new TreeSelectionListener() {

public void valueChanged(TreeSelectionEvent tse) {

((DefaultTreeModel)jt2.getModel()).setRoot((TreeNode)tse.getPath().getLastPathComponent());

}

});

setSize(500,500);

setVisible(true);

}

public static void main(String[] arghs) { new Test3(); }

}

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