Creates an Executor that uses a single worker thread operating off an unbounded queue, and uses the provided ThreadFactory to create a new thread when needed. Unlike the otherwise equivalent newFixedThreadPool(1, threadFactory) the returned executor is guaranteed not to be reconfigurable to use additional threads.

Parameters:

threadFactory

the factory to use when creating new threads

Returns:  the newly created single-threaded Executor

Exceptions:

NullPointerException

if threadFactory is null