How do I create a ScriptEngine for JavaScript?

This examples demonstrate how to create a JavaScript interpreter or the ScriptEngine for running JavaScript script. The classes related to scripting is packaged under the javax.script package.

Java is since version 6 allows us to script Java using a scripting language such as JavaScript. This allows us to let the user of our program to change or add behavior to the program through scripting language.

package org.kodejava.example.script;

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;

public class GettingJavaScriptEngine {
    public static void main(String[] args) {
        // Creating an instance of ScriptManager. With ScriptManager in hand we
        // can create an interpreter or ScriptEngine to run JavaScript.
        ScriptEngineManager manager = new ScriptEngineManager();
        // Calling manager.getEngineByExtension("js") returns a ScriptEngine
        // implementation for JavaScript. "js" is the standar extension for
        // JavaScript script file.
        ScriptEngine engine = manager.getEngineByExtension("js");

        // Do something with the script engine.

Wayan Saryada

Programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

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