How to output HTML from JSP <%! … %> block?

Question

I just started learning JSP technology, and came across a wall.

How do you output HTML from a method in <%! ... %> JSP declaration block?

This do

Answer 1

too late to answer it but this help others

<%! 
     public void printChild(Categories cat, HttpServletResponse res ){
       try{
          if(cat.getCategoriesSet().size() >0){
              res.getWriter().write("") ; 
          }
       }catch(Exception exp){

       }
     }

%>