Nashorn.java

package ch.claude_martin.playground;

import java.io.IOException;

import javax.script.Bindings;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.script.SimpleBindings;

public class Nashorn {

	public static void main(String[] args) throws IOException, ScriptException {
		ScriptEngineManager engineManager = new ScriptEngineManager();
		ScriptEngine engine = engineManager.getEngineByName("nashorn");
		Bindings bindings = new SimpleBindings();
		engine.eval("function sum(a, b) { return a + b; }", bindings);
		int a = 2;
		int b = 40;
		long c;
		c = (long) engine.eval("sum(" + a + ", " + b + ");", bindings);
		System.out.println(c);

		bindings.put("a", a);
		bindings.put("b", b);
		c = (long) (double) engine.eval("sum(a,b);", bindings);
		System.out.println(c);
	}

}