How To Call A Java Script From Java Code?

This post is to describe how to call a java script from java code.

Below is  java file.In which there is a main method.In this main method a script engine instance is taken.This script engine is already with jdk.For this one need not to add any other jar file.

import java.io.FileNotFoundException;
import java.io.FileReader;
 
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
 
public class Driver {
 
/**
* @param args
* @throws FileNotFoundException
*/
public static void main(String[] args) throws FileNotFoundException {
try {
/**
* To call a anonymous function from java script file
*/
ScriptEngine engine = new ScriptEngineManager()
.getEngineByName("javascript");
FileReader fr = new FileReader("src/js/MySpec.js");
engine.eval(fr);
 
} catch (ScriptException scrEx) {
scrEx.printStackTrace();
}
}
}

Below is the java script file with an anonymous fuction.This function is to print on the console.

// java script anonumous function
(function() {
 print('Hello world');
})();

Below is the folder structure of the project.

Folder Structure

Your Suggestions Are Always Welcomed.