script-tag.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="java" default="main" basedir=".">
  <target name="main">
    <script language="javascript"> 
     <![CDATA[
      with(new JavaImporter(java.lang, java.io)){ 
        var fun = function(a,b){ 
           System.out.println(a+b); 
        }; 
        fun(1,2); 
     }
    ]]> 
    </script>
  </target>
</project>