Future Example with ExecutorService Interface:-
A cancellable asynchronous computation. This class provides a base implementation of Future, with methods to start and cancel
a computation, query to see if the computation is complete, and
retrieve the result of the computation. The result can only be
retrieved when the computation has completed; the get
methods will block if the computation has not yet completed. Once
the computation has completed, the computation cannot be restarted
or cancelled (unless the computation is invoked using#runAndReset.
A FutureTask can be used to wrap a Callable or
Runnable object. Because FutureTask implements
Runnable, a FutureTask can be submitted to an
Executor for execution.
Example of FutureTask with ExecutorService Interface:-