playing around with nashorn javascript extensions

winterbe · winterbe · commit 7d8c0cc422d4 · 2014-03-31T22:15:48.000+02:00
diff --git a/res/nashorn3.js b/res/nashorn3.js
@@ -104,4 +104,22 @@ new Thread(new Printer()).start();
 
 new Thread(function() {
     print('this was printed from another thread');
-}).start();
+}).start();
+
+
+print('------------------');
+print('Parameter Overload:');
+
+var System = Java.type('java.lang.System');
+
+System.out.println(10);
+System.out["println"](11.0);
+System.out["println(double)"](12);
+
+print('------------------');
+print('JavaBeans:');
+
+var Date = Java.type('java.util.Date');
+var date = new Date();
+date.year += 1900;
+System.out.println(date.year);
diff --git a/res/nashorn4.js b/res/nashorn4.js
@@ -0,0 +1,52 @@
+// function literal with no braces
+
+function sqr(x) x * x;
+
+print(sqr(3));
+
+
+// for each
+
+var array = [1, 2, 3, 4];
+for each (var num in array) print(num);
+
+
+// object literals in constructors
+
+var runnable = new java.lang.Runnable() {
+    run: function() {
+        print('on the run');
+    }
+};
+
+runnable.run();
+
+
+// bind properties
+
+var o1 = {};
+var o2 = { foo: 'bar'};
+
+Object.bindProperties(o1, o2);
+
+print(o1.foo);
+o1.foo = 'BAM';
+print(o2.foo);
+
+
+// string trim
+
+print("   hehe".trimLeft());
+print("hehe    ".trimRight() + "he");
+
+
+// whereis
+print(__FILE__, __LINE__, __DIR__);
+
+
+// java import
+
+var imports = new JavaImporter(java.util, java.io);
+with (imports) {
+    var map = new HashMap();
+}
diff --git a/src/com/winterbe/java8/Nashorn4.java b/src/com/winterbe/java8/Nashorn4.java
@@ -0,0 +1,18 @@
+package com.winterbe.java8;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+
+/**
+ * Working with java types from javascript.
+ *
+ * @author Benjamin Winterberg
+ */
+public class Nashorn4 {
+
+    public static void main(String[] args) throws Exception {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
+        engine.eval("loadWithNewGlobal('res/nashorn4.js')");
+    }
+
+}
