working with java types from within javascript

winterbe · winterbe · commit 7c319e39cfc6 · 2014-03-30T22:06:07.000+02:00
diff --git a/res/nashorn3.js b/res/nashorn3.js
@@ -0,0 +1,50 @@
+print('------------------');
+print('IntArray:');
+
+var IntArray = Java.type('int[]');
+
+var array = new IntArray(5);
+array[0] = 5;
+array[1] = 4;
+array[2] = 3;
+array[3] = 2;
+array[4] = 1;
+
+for (var i = 0; i < array.length; i++) {
+    print(array[i]);
+}
+
+try {
+    array[5] = 23;
+} catch (e) {
+    print(e.message);
+}
+
+array[0] = "17";
+print(array[0]);
+
+array[0] = "wrong type";
+print(array[0]);
+
+array[0] = "17.3";
+print(array[0]);
+
+print('------------------');
+
+for (var i in array) print(i);
+
+print('------------------');
+
+for each (var val in array) print(val);
+
+print('------------------');
+print('ArrayList:');
+
+var ArrayList = Java.type('java.util.ArrayList');
+
+var list = new ArrayList();
+list.add('a');
+list.add('b');
+list.add('c');
+
+for each (var el in list) print(el);
diff --git a/src/com/winterbe/java8/Nashorn3.java b/src/com/winterbe/java8/Nashorn3.java
@@ -0,0 +1,19 @@
+package com.winterbe.java8;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import java.io.FileReader;
+
+/**
+ * Working with java types from javascript.
+ *
+ * @author Benjamin Winterberg
+ */
+public class Nashorn3 {
+
+    public static void main(String[] args) throws Exception {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
+        engine.eval(new FileReader("res/nashorn3.js"));
+    }
+
+}
