--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeArrayBuffer.java	Mon Mar 16 17:01:47 2015 +0530
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeArrayBuffer.java	Mon Mar 16 16:17:19 2015 +0100
@@ -26,7 +26,9 @@
 package jdk.nashorn.internal.objects;
 
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
+
 import java.nio.ByteBuffer;
+
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
@@ -101,7 +103,7 @@
         }
 
         if (args.length == 0) {
-            throw new RuntimeException("missing length argument");
+            return new NativeArrayBuffer(0);
         }
 
         return new NativeArrayBuffer(JSType.toInt32(args[0]));

--- a/nashorn/test/script/basic/typedarrays.js	Mon Mar 16 17:01:47 2015 +0530
+++ b/nashorn/test/script/basic/typedarrays.js	Mon Mar 16 16:17:19 2015 +0100
@@ -28,6 +28,17 @@
  * @run
  */
 
+//JDK-8066217, constructor for arraybuffer not behaving as per spec
+function checkLength(ab, l) {
+    if (ab.byteLength != l) {
+        throw "length error: " + ab.byteLength + " != " + l;
+    }
+}
+checkLength(new ArrayBuffer(), 0);
+checkLength(new ArrayBuffer(0), 0);
+checkLength(new ArrayBuffer(1024), 1024);
+checkLength(new ArrayBuffer(1,2,3), 1);
+checkLength(new ArrayBuffer([17]), 17);
 
 var typeDefinitions = [
 Int8Array,