issue in retriving the height and width

I have developed an application in the blackberry in which it have to be b开发者_如何学Cuild in any model of blackberry, the application in which i have developed does not show some icon which are in border, can any body help how to get the height and width of the mobile in the blackberry

 int screenHeight = Display.getHeight();
 int screenWidth = Display.getWidth();