Executor Service Example, for invoking multiple calls Parallelly

You may need to run a particular task (that can run independently) in parallel fashion in order to improve performance, or lets say, simulate a method call in multi-threaded environment:

Here is a example code snippet to do so:

	//prepare task
	Callable<String> callableTask = () -> {
	callAMethodHere(); // do you execution here, write to file or call an exiting method etc.
	return "Tasker";
	};
	List<Callable<String>> callableTasks = new ArrayList<>();
	for(int counnt=0; count < 10 ; count++){
	callableTasks.add( callableTask );
	}
	//prepare executor service
	ExecutorService executorService = Executors.newFixedThreadPool(10);
	List<Future<String>> futures = executorService.invokeAll(callableTasks);
	executorService.shutdown();

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