JTree

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.tree.*;
public class sri3 extends JApplet
{
JTree tree;
JTextField jtf;
public void init()
{
Container ContentPane=getContentPane();
ContentPane.setLayout(new BorderLayout());
DefaultMutableTreeNode top=new DefaultMutableTreeNode("options");
DefaultMutableTreeNode a=new DefaultMutableTreeNode("A");
top.add(a);
DefaultMutableTreeNode a1=new DefaultMutableTreeNode("B1");
a.add(a1);
DefaultMutableTreeNode a2=new DefaultMutableTreeNode("B2");
a.add(a2);
DefaultMutableTreeNode b=new  DefaultMutableTreeNode("B");
top.add(b);
DefaultMutableTreeNode b1=new DefaultMutableTreeNode("B1");
b.add(b1);
DefaultMutableTreeNode b2=new DefaultMutableTreeNode("B2");
b.add(b2);
tree=new JTree(top);
int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
int n=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
JScrollPane jsp=new JScrollPane(tree,v,n);
ContentPane.add(jsp,BorderLayout.CENTER);
jtf=new JTextField(" ",20);
ContentPane.add(jtf,BorderLayout.SOUTH);
tree.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent me)
{
doMouseClicked(me);
}
});
}
void doMouseClicked(MouseEvent me)
{
TreePath tp=tree.getPathForLocation(me.getX(),me.getY());
if(tp!=null)
jtf.setText(tp.toString());
else
jtf.setText(" ");
}
}
/*<applet code=sri3 width=200 height=300>
</applet>*/