Question

I am porting some of the java code and need to be able to flip (javax.nio.Buffer.flip()).

I am using byte[] to store data, and I want to flip these byte array, much like Buffer does it, as I believe underneath Buffer class uses byte[] as well.

Thanks

Answer 1

ByteBuffer may use a byte[] (create from, say, ByteBuffer.wrap) or non-Java heap memory (created with ByteBuffer.allocateDirect). You can get the underlying byte[] with ByteBuffer.array. But calling flip and similar methods on buffers does not chnage the actual data. Instead offsets associated with the data are changed. So the equivalent with byte would be to change the offsets that your code is associating with it.