You will probably want to make any written output, however, compliant with HTML rules. That way the Java output will fit into the design of the rendered page, or at least not cause HTML parser errors.

JavaServer Pages (JSPs) technology is an extension of Java servlet technology and combines HTML and Java code into a single file. While Java servlet technology focuses on Java classes capable of ...

When you surf the Internet and peruse a Web page with interactive content, chances are that the page was developed using Microsoft Corp.’s Active Server Pages (ASP) technology or Sun Microsystems Inc.