Here you can find the source of createNashornEngine()
@Nonnull public static ScriptEngine createNashornEngine()
//package com.java2s; /**/* w w w. j av a2 s . c om*/ * Copyright (C) 2014-2017 Philip Helger (www.helger.com) * philip[at]helger[dot]com * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import javax.annotation.Nonnull; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class Main { private static final ScriptEngineManager s_aScriptFactory = new ScriptEngineManager(); @Nonnull public static ScriptEngine createNashornEngine() { // create a Nashorn script engine return s_aScriptFactory.getEngineByName("nashorn"); } }