src/java.desktop/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

@@ -49,10 +49,11 @@
     private native long nativeCreateNSWindow(long nsViewPtr,long ownerPtr, long styleBits, double x, double y, double w, double h);
     private static native void nativeSetNSWindowStyleBits(long nsWindowPtr, int mask, int data);
     private static native void nativeSetNSWindowMenuBar(long nsWindowPtr, long menuBarPtr);
     private static native Insets nativeGetNSWindowInsets(long nsWindowPtr);
     private static native void nativeSetNSWindowBounds(long nsWindowPtr, double x, double y, double w, double h);
+    private static native void nativeSetNSWindowLocationByPlatform(long nsWindowPtr);
     private static native void nativeSetNSWindowStandardFrame(long nsWindowPtr,
             double x, double y, double w, double h);
     private static native void nativeSetNSWindowMinMax(long nsWindowPtr, double minW, double minH, double maxW, double maxH);
     private static native void nativePushNSWindowToBack(long nsWindowPtr);
     private static native void nativePushNSWindowToFront(long nsWindowPtr);

@@ -528,10 +529,14 @@
         updateIconImages();
         updateFocusabilityForAutoRequestFocus(false);
 
         boolean wasMaximized = isMaximized();
 
+        if (visible && target.isLocationByPlatform()) {
+            nativeSetNSWindowLocationByPlatform(getNSWindowPtr());
+        }
+        
         // Actually show or hide the window
         LWWindowPeer blocker = (peer == null)? null : peer.getBlocker();
         if (blocker == null || !visible) {
             // If it ain't blocked, or is being hidden, go regular way
             if (visible) {