how to randomly select from list of variables (bitmaps) with incremental names using Iterator and/or loop ? (java, blackberry, bb)

I ha开发者_运维百科ve a big list (say about thousand) of .png bitmaps with incremental names:

_image1 = Bitmap.getBitmapResource("a1.png");
_image2 = Bitmap.getBitmapResource("a2.png"); 
_image3 = Bitmap.getBitmapResource("a3.png");
  ...
_image999 = Bitmap.getBitmapResource("a999.png");
_image1000 = Bitmap.getBitmapResource("a1000.png");

I need a code to select one bitmap and attach it to BitmapField myBitmapField, when integer myCounter obtains random value from 1 to 1000. I could do it by checking value of myCounter thousand times by using if and else :

if (myCounter == 1)
   myBitmapField.setBitmap(_image1);
else if (myCounter == 2)
   myBitmapField.setBitmap(_image2);
else if (myCounter == 3)
   myBitmapField.setBitmap(_image3);
  ...
else if (myCounter == 1000)
   myBitmapField.setBitmap(_image1000);

But that would be very long code. Is there a way of doing it using Loop and/or Iterator ? Something like this:

int i = 0;
while (i < 1000) 
 { 
   i = i + 1;
   if (myCounter == i)
    myBitmapField.setBitmap(_image[i]); 
 }

Is there an easy and short way of doing it ? Thank you very much for help! (Java for blackberry)

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What about dynamically generating the name, like

myBitmapField.setBitmap(Bitmap.getBitmapResource("a" + myCounter + ".png"));

If you're concerned about resource duplication, you can check a cache first.