<code Java>
package tree;

public class Info {
    public String name;
    public String path;
    public Boolean directory;
    public Boolean ready; // vyplneny podadresare

    public String toString () { return name; }    
}
</code>


<code Java>
    private void displayDirectory (DefaultMutableTreeNode target, File dir, int level)
    {
       File [] list = dir.listFiles();
       if (list == null)
       {
               DefaultMutableTreeNode node = new DefaultMutableTreeNode ("nepristupny adresar");
               target.add (node);
       }
       else
       {
            for (File item : list)
            {
               Info data = new Info ();
               data.name = item.getName();
               data.path = item.getAbsolutePath ();
               data.directory = item.isDirectory ();
       
               DefaultMutableTreeNode node = new DefaultMutableTreeNode (data);
               target.add (node);

               if (level > 1 && data.directory)
                   displayDirectory (node, item, level-1);
            }
       }
    }
    
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       String dir_name = "C:\\";
       try 
       {
            File d0 = new File (dir_name);
            dir_name = d0.getCanonicalPath();
            setTitle(dir_name);
       } 
       catch (IOException ex) 
       { 
            setTitle (ex.getMessage());
       }
       File d = new File (dir_name);
       
       Info data = new Info ();
       data.name = d.getName();
       data.path = d.getAbsolutePath ();
       data.directory = true;
       
       DefaultMutableTreeNode root = new DefaultMutableTreeNode (data);
       displayDirectory (root, d, 2);
       DefaultTreeModel model = new DefaultTreeModel (root);
       jTree1.setModel (model);
    }                                        

    private void jTree1TreeExpanded(javax.swing.event.TreeExpansionEvent evt) {                                    
        Object last = evt.getPath().getLastPathComponent();
        DefaultMutableTreeNode node = (DefaultMutableTreeNode) last;
        String txt = (String) node.getUserObject();
        this.setTitle("expand " + txt);
    }                                   

</code>