What's the purpose to bit-shift int value by zero?

Question

Looking to the source code of java.nio.DirectByteBuffer class, I have found this:

if ((length << 0) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) ....
         


        

Answer 1

I think I've solved it.

In the class JavaDocs:

// -- This file was mechanically generated: Do not edit! -- //

So it is not hand coded. It was script-generated and the script writer did not add an optimisation for the case when the amount to bit shift by is zero.