execjs

(function(program, runner) { runner(program); })(function(Packages,getClass,JavaAdapter,JavaImporter,java,javax,org,com,edu,net,global,defineClass,deserialize,doctest,gc,help,load,loadClass,print,quit,readline,readFile,readUrl,runCommand,seal,serialize,spawn,sync,toint32,version,write,Environment,environment,history,arguments,i,importClass,importPackage) {
  return <%= source %>;
}, function(program, undefined) {
  var result;
  try {
    result = program();
    try {
      if (result === undefined) {
        java.lang.System.out.println('["ok"]');
      } else {
        java.lang.System.out.println(JSON.stringify(['ok', result]));
      }
    } catch (err) {
      java.lang.System.out.println('["err"]');
    }
  } catch (err) {
    java.lang.System.out.println(JSON.stringify(['err', '' + err, err.stack]));
  }
});