Convert ByteBuffer to byte array java
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.