Visualizacion e Identificación de Iconos.

    private class MyRenderer extends DefaultTreeCellRenderer {
        ImageIcon tutorialIcon, tutorialIcon1 ;

        public MyRenderer() {
            tutorialIcon = new ImageIcon("mujer.jpg");
	    tutorialIcon1 = new ImageIcon("hombre.jpg");
        }

        public Component getTreeCellRendererComponent(
                            JTree tree,
                            Object value,
                            boolean sel,
                            boolean expanded,
                            boolean leaf,
                            int row,
                            boolean hasFocus) {

            super.getTreeCellRendererComponent(
			    tree, value, sel,
                            expanded, leaf, row,
                            hasFocus);
            if (leaf && isTutorialBook(value)) {
                setIcon(tutorialIcon);
                setToolTipText("mujer");
            } else 
		if (leaf && isTutorialBook1(value)) {
		    setIcon(tutorialIcon1);
		    setToolTipText("hombre");
		} else {
		    setToolTipText("Modalidad Grado Once");
		}
	    
            return this;
        }
	
        protected boolean isTutorialBook(Object value) {
            DefaultMutableTreeNode node =
		(DefaultMutableTreeNode)value;
            BookInfo nodeInfo = 
		(BookInfo)(node.getUserObject());
            String title = nodeInfo.bookName;
            if (title.indexOf("+") >= 0) {
                return true;
            } 
	    
            return false;
        }
	
	protected boolean isTutorialBook1(Object value) {
            DefaultMutableTreeNode node =
		(DefaultMutableTreeNode)value;
            BookInfo nodeInfo = 
		(BookInfo)(node.getUserObject());
            String title = nodeInfo.bookName;
            if (title.indexOf("-") >= 0) {
                return true;
            } 
	    return false;
        }
    }
}