Nashorn (#896)

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

@@ -0,0 +1,48 @@
+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);
+    }
+}