How to convert int[] to byte[]?

Question

Java

I have an int[] array with elements ranging from 0 to 255. How can I convert this array to a byte array so that it can be decoded to UTF-8 ?

Answer 1

int[] data = { 100, 200, 300, 400 };

ByteBuffer byteBuffer = ByteBuffer.allocate(data.length * 4);        
IntBuffer intBuffer = byteBuffer.asIntBuffer();
intBuffer.put(data);

byte[] array = byteBuffer.array();

PS: stackoverflow

Answer 2

And what prevents you from allocating an array of bytes and writing values ​​there in a loop?