How access class hidden variables in android

unable to access * @see #TYPE_BUILT_IN variable in Display class , but it showing in Display class .How to access that variable , help me thanks in advance.

       DisplayManager manager = (DisplayManager) getSystemService(Context. DISPLAY_SERVICE);
   Display[] display = manager.getDisplays();

   // Display.DEFAULT_DISPLAY = 0; 
   // Display. TYPE_BUILT_IN = 1; 
   Presentation p = new Presentation(getApplicationContext(), display[Display.TYPE_BUILT_IN]);