import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;

import javax.script.Invocable;

import java.io.FileReader;

import java.io.FileNotFoundException;

import java.lang.NoSuchMethodException;

public class Example {

private void runJsFile() throws ScriptException, FileNotFoundException {

ScriptEngineManager m = new ScriptEngineManager();

ScriptEngine e = m.getEngineByExtension("js");

e.eval(new FileReader("./runme.js"));

}

public static void main(String[] args) throws ScriptException, NoSuchMethodException, FileNotFoundException {

ScriptEngineManager m = new ScriptEngineManager();

ScriptEngine e = m.getEngineByExtension("js");

e.eval("function post(message){ print(message) }");

Invocable i = (Invocable) e;

i.invokeFunction("post","Greetings from Earth.");

Example ex = new Example();

ex.runJsFile();

}

}