Java split bytes array into chunks

Splitter.java

byte[] data = { 2, 3, 5, 7, 8, 9, 11, 12, 13 };

int blockSize = 3;
int blockCount = (data.length + blockSize - 1) / blockSize;

byte[] range = null;

for (int i = 1; i < blockCount; i++) {
		int idx = (i - 1) * blockSize;
		range = Arrays.copyOfRange(data, idx, idx + blockSize);
		System.out.println("Chunk " + i + ": " Arrays.toString(range));
}

// Last chunk
int end = -1;
if (data.length % blockSize == 0) {
		end = data.length;
} else {
		end = data.length % blockSize + blockSize * (blockCount - 1);
}
		
range = Arrays.copyOfRange(data, (blockCount - 1) * blockSize, end);

System.out.println("Chunk " + blockCount + ": " Arrays.toString(range));