Display screen Display.fromObject(Object obj);
  obj    screen.


Displayable dsp Display.getCurrent(Display screen);
    screen    dsp.


Display screen Display.getDisplay();
   .


boolean is_color Display.isColor(Display screen);
  screen ,  ,  - .


int colors Display.numColors(Display screen);
      screen.


void Display.setCurrent0(Display screen, Alert wind, Displayable dsp);
  screen     dsp,       wind.


void Display.setCurrent1(Display screen, Displayable dsp);
  screen     dsp.


Object obj Display.toObject(Display screen);
  screen   obj.