src/macosx/classes/sun/awt/CGraphicsDevice.java

*** 217,226 ****
--- 217,232 ----
      @Override
      public DisplayMode[] getDisplayModes() {
          return nativeGetDisplayModes(displayID);
      }
  
+     public int getScaleFactor() {
+         return (int) nativeGetScaleFactor(displayID);
+     }
+ 
+     private static native double nativeGetScaleFactor(int displayID);
+ 
      private static native void nativeSetDisplayMode(int displayID, int w, int h, int bpp, int refrate);
  
      private static native DisplayMode nativeGetDisplayMode(int displayID);
  
      private static native DisplayMode[] nativeGetDisplayModes(int displayID);