Convert ByteBuffer To Byte Array Java


Answer :

ByteBuffer exposes the bulk get(byte[]) method which transfers bytes from the buffer into the array. You'll need to instantiate an array of length equal to the number of remaining bytes in the buffer. 



ByteBuffer buf = ...
byte[] arr = new byte[buf.remaining()];
buf.get(arr);


If hasArray() reports false then, calling array() will throw an exception.



In that case, the only way to get the data in a byte[] is to allocate a byte[] and copy the bytes to the byte[] using get(byte) or similar.



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