Get return value from Loading and Executing internal JavaScript from Java - Java Scripting

Java examples for Scripting:Run Script

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Description

Get return value from Loading and Executing internal JavaScript from Java

Demo Code

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Main {

  public static void main(String[] args) {
    ScriptEngineManager sem = new ScriptEngineManager();
    ScriptEngine nashorn = sem.getEngineByName("nashorn");
    try {//  w  w w  . j av  a  2 s  . c o m
        nashorn.eval("function a(width, length, avgDepth){var volume = avgDepth * width * length;"
                + "                                             return volume * 0.8; }");
        Double a = (Double) nashorn.eval("a(6,3,5);");
        System.out.println(a);
    } catch (ScriptException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    }
  }
}

Result


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