import java.io.*;
import javax.script.*;

public class Jtest6{

    public static void main(String[] args){
        ScriptEngineManager factory = new ScriptEngineManager();
        ScriptEngine js = factory.getEngineByName("JavaScript");
        Object obj = null;
        try {
            obj = js.eval("function f(a){println(a);return a;}");
            obj = js.eval("f(1)");
        } catch (ScriptException e){
            System.out.printf("exception %s\n",e);
        }
    }
}

results in

exception javax.script.ScriptException: ReferenceError: "println" is not defined in <eval> at line number 1