src/macosx/native/sun/awt/AWTWindow.m

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -250,10 +250,14 @@
     self.javaPlatformWindow = platformWindow;
     self.styleBits = bits;
     self.ownerWindow = owner;
     [self setPropertiesForStyleBits:styleBits mask:MASK(_METHOD_PROP_BITMASK)];
 
+    if (IS(self.styleBits, IS_POPUP)) {
+        [self.nsWindow setCollectionBehavior:(1 << 8) /*NSWindowCollectionBehaviorFullScreenAuxiliary*/]; 
+    }
+
     return self;
 }
 
 + (BOOL) isAWTWindow:(NSWindow *)window {
     return [window isKindOfClass: [AWTWindow_Panel class]] || [window isKindOfClass: [AWTWindow_Normal class]];