I'm experimenting with calling Java libraries from Perlito5-Java; calling into the JVM Javascript engine was pretty easy:

# here we import the Java packages into Perl packages: package ScriptEngineManager { import => "javax.script.ScriptEngineManager" }; package ScriptEngine { import => "javax.script.ScriptEngine" }; # these are Perl variables, but they are also Java objects # so we have to declare which package they belong to: my ScriptEngineManager $manager = new ScriptEngineManager(); my ScriptEngine $engine = $manager->getEngineByName("JavaScript"); # now we can call the Rhino javascript engine: $engine->eval( 'print( "JS thinks that the result is " + ( 1+1 ) + "

" );' ); # JS thinks that the result is 2

The source code is at https://github.com/fglock/Perlito/blob/master/misc/Java/TestJS.pl; I've tested with javac 1.7.0_79 in Ubuntu.