import java.awt.*;  
import java.util.ArrayList;

import javax.swing.*;  
import javax.swing.tree.*;  

public class PathTest  
{  
    public PathTest()  
    {  

    DefaultMutableTreeNode   node = buildNodeFromString();   


        DefaultTreeModel model = new DefaultTreeModel(node);  
        JTree tree = new JTree(model);  
        JFrame f = new JFrame();  
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        f.add(tree);  
        f.setSize(300,300);  
        f.setLocation(200,200);  
        f.setVisible(true);  
    }  

private DefaultMutableTreeNode buildNodeFromString() {



String qqq= "node1/node2/node3/node4";
DefaultMutableTreeNode node, lastNode = null, root = null;

    String[] s = qqq.split("/");
    for (String str : s) {
    node = new DefaultMutableTreeNode(str);     
    if (root == null)
        root = node;
    if (lastNode != null)
        lastNode.add(node);
    lastNode = node;
    }

return root;
}

    public static void main(String[] args)  
    {  
        new PathTest();  
    }  
}