Nashorn second Attempt (#923)

* Nashorn

* Nashorn x2

* Nashorn added trailing newlines

* Cleanup

* Formatted script lines

* Change system outs to asserts

* Change Nashorn to be Junit tests

* Remove empty test

core-java/src/main/java/com/baeldung/scripting/Nashorn.java

@@ -1,48 +0,0 @@
-package com.baeldung.scripting;
-
-import javax.script.Bindings;
-import javax.script.Invocable;
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-import javax.script.ScriptException;
-
-public class Nashorn {
-    public static void main(String[] args) throws ScriptException, NoSuchMethodException {
-        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
-
-        Object result = engine.eval(
-                "var greeting='hello world';" +
-                        "print(greeting);" +
-                        "greeting");
-
-        System.out.println(result);
-
-        Bindings bindings = engine.createBindings();
-        bindings.put("count", 3);
-        bindings.put("name", "baeldung");
-
-        String script = "var greeting='Hello ';" +
-                "for(var i=count;i>0;i--) { " +
-                "greeting+=name + ' '" +
-                "}" +
-                "greeting";
-
-        Object bindingsResult = engine.eval(script, bindings);
-        System.out.println(bindingsResult);
-
-        engine.eval("function composeGreeting(name) {" +
-                "return 'Hello ' + name" +
-                "}");
-        Invocable invocable = (Invocable) engine;
-
-        Object funcResult = invocable.invokeFunction("composeGreeting", "baeldung");
-        System.out.println(funcResult);
-
-        Object map = engine.eval("var HashMap = Java.type('java.util.HashMap');" +
-                "var map = new HashMap();" +
-                "map.put('hello', 'world');" +
-                "map");
-
-        System.out.println(map);
-    }
-}