public static String getString( DefaultMutableTreeNode node){       
        String strings= new String();
       
        TextBlockType.TextLine textline=(TextBlockType.TextLine) node.getUserObject();
        List <String> s=textline.getString();
        for (int i=0; i<s.size();i++)
        {
        strings+= s.get(i);
        strings+=" ";
        }
        
       
        return strings;
    }