A channel that is asynchronously closable permits a thread blocked on an IO operation (the IO thread) to be released by another thread calling the channel's close() method. The IO thread will throw an AsynchronousCloseException and the channel will be closed.

A channel that is interruptible permits a thread blocked on an IO operation (the IO thread) to be interrupted by another thread (by invoking interrupt() on the IO thread). When the IO thread is interrupted it will throw a ClosedByInterruptException exception, it will have its interrupted status set, and the channel will be closed. If the IO thread attempts to make an IO call with the interrupt status set the call will immediately fail with a ClosedByInterruptException.