What is the best resizable circular byte buffer available in Java?

Question

I need a byte buffer class in Java for single-threaded use. I should be able to insert data at the back of the buffer and read data at the front, with an amortized cost of O(1).

Answer 1

Not sure if it is "the best", but you have a nice example of Circular Byte buffer here.

Those Java Utilities - OstermillerUtils classes are under GPL license.

This Circular Byte Buffer implements the circular buffer producer/consumer model for bytes. Filling and emptying the buffer is done with standard Java InputStreams and OutputStreams.

Using this class is a simpler alternative to using a PipedInputStream and a PipedOutputStream.
PipedInputStreams and PipedOutputStreams don't support the mark operation, don't allow you to control buffer sizes that they use, and have a more complicated API that requires a instantiating two classes and connecting them.