Script Engine Test

Main.java

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

public class Main {

    public static void main(String[] args) throws ScriptException {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");
        System.out.println(engine.toString());
        Object result = engine.eval("1 + 2");
        System.out.println("Result: " + result);
    }
}

Java11

Warning: Nashorn engine is planned to be removed from a future JDK release
jdk.nashorn.api.scripting.NashornScriptEngine@3ec300f1
Result: 3

GraalJS 21.2.0

com.oracle.truffle.js.scriptengine.GraalJSScriptEngine@335eadca
Result: 3

Java17(Preview)

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "Object.toString()" because "engine" is null
	at Main.main(Main.java:10)