Question

I have one big byte[] array and lot of small byte arrays ( length of big array is sum of lengths small arrays). Is there maybe some quick method to copy one array to another from starting position to ending, not to use for loop for every byte manually ?

Answer 1

You can use a ByteBuffer.

ByteBuffer target = ByteBuffer.wrap(bigByteArray);
target.put(small1);
target.put(small2);
...;