The need for an immutable byte array wrapper in Java

[Keith Turner]

I recently wrote the following blog post about the need for an immutable byte array wrapper.  In the post I mentioned Protocol Buffers nice implementation ByteString.  I am curious if anyone has made an attempt to push ByteString up into java?  Seems like it would be a nice addition to java.lang! 

http://fluo.apache.org/blog/2016/11/10/immutable-bytes/