How can I use Jikes with Tomcat?

I just have the answer from newsgroup, thx to Gerhard [gerhard.nospam@bigfoot.de]

1) Put the path to jikes (or jikes.exe) in your PATH
 
2) In the $TOMCAT_HOME/conf/web.xml file, search for jikes and you will find
 
<!-- uncomment the following to use Jikes for JSP compilation -->
 
        <init-param>
           
<param-name>jspCompilerPlugin</param-name>
 
<param-value>org.apache.jasper.compiler.JikesJavaCompiler</param-value>
</init-param>
 

The relevant changes that enable jikes are the first and last line.