DefaultMutableTreeNode r  = new DefaultMutableTreeNode( "TreeT" );
    DefaultMutableTreeNode p1 = new DefaultMutableTreeNode( "P1" );
    DefaultMutableTreeNode p2 = new DefaultMutableTreeNode( "P2" );
    DefaultMutableTreeNode c11 = new DefaultMutableTreeNode( "C1.1" );
    DefaultMutableTreeNode c12 = new DefaultMutableTreeNode( "C1.2" );

    JTree00 t = new JTree00( r );

    t.addObject( r, p1 );
    t.addObject( r, p2 );

    t.addObject( p1, c11 );
    t.addObject( p1, c12 );