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 *

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 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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 */

import javax.script.*;

public class RunnableImplObject {

    public static void main(String[] args) throws Exception {

        ScriptEngineManager manager = new ScriptEngineManager();

        ScriptEngine engine = manager.getEngineByName("nashorn");

        // JavaScript code in a String

        String script = "var obj = new Object(); obj.run = function() { print('run method called'); }";

        // evaluate script

        engine.eval(script);

        // get script object on which we want to implement the interface with

        Object obj = engine.get("obj");

        Invocable inv = (Invocable) engine;

        // get Runnable interface object from engine. This interface methods

        // are implemented by script methods of object 'obj'

        Runnable r = inv.getInterface(obj, Runnable.class);

        // start a new thread that runs the script implemented

        // runnable interface

        Thread th = new Thread(r);

        th.start();

        th.join();

    }

}