public void run() {
        Window w = new Window ();
        w.setVisible (true);
        // w.test ();
        w.detail (this);
    }

pridat do tridy Window

import javax.swing.tree.*;
import org.alice.apis.moveandturn.*;
import java.lang.reflect.*;

    // import org.alice.apis.moveandturn.*;
    public void detail (Composite c)
    {
        open (c.getName());
        Transformable[] a = c.getComponents();
        for (Transformable t : a)
            if (t instanceof Composite)
               detail ((Composite) t);
            else
               put (t.toString ());
 
        Class cls = c.getClass ();
        open ("methods of " + cls.getName ());
        // import java.lang.reflect.*;
        Method [] met = cls.getMethods();
        for (Method m : met)
            put (m.getName());
        close ();
 
        close ();
    }

    DefaultTreeModel model;
    DefaultMutableTreeNode act;
 
    public void open (Object s)
    {
        DefaultMutableTreeNode node = new DefaultMutableTreeNode (s);
        if (model == null)
        {
            model = new DefaultTreeModel (node);
            jTree1.setModel (model);
        }
        else
        {
            int inx = act.getChildCount();
            model.insertNodeInto (node, act, inx);
        }
        act = node;
    }
 
    public void put (Object s)
    {
        DefaultMutableTreeNode node = new DefaultMutableTreeNode (s);
        int inx = act.getChildCount();
        model.insertNodeInto (node, act, inx);
    }
 
    public void close ()
    {
       act = (DefaultMutableTreeNode) act.getParent();
    }
 
    public void test ()
    {
        open ("Abc");
                put ("item 1");
                put ("item 2");
                open ("Klm");
                    put ("item 3");
                close ();
                put ("item 4");
        close ();
    }
 
    // import org.alice.apis.moveandturn.*;
    public void detail (Composite c)
    {
 
    }