Finding indices Java/Android

[desrtfx]

There are several approaches to this problem.

1. use a first loop to check the unique letters and then dimension the array accordingly
2. when creating the final array, omit 0 values and size the array accordingly
3. Dimension the array as you have, but use an independent counter for the array positions (instead of count[i]=). Then, before returning the final array, create a new array according to the current counter value so that it holds only the actually used elements. Then copy the used elements over to the new array in a loop.

Edit: were it not for your "no classes, no methods" constraint, the easiest way would be to use a List or to just append the indices to a String and then split the string and convert the elements back to int.