callable

Returns Trueif The object argument is an object that can be called, otherwise False. It is important to note, however, that when an object is callable, it does not mean that the object is invoked when it succeeds, but the non-callable object must

Java Multithreading Implementation method Java multithreading implementation methods mainly have three kinds: inherit thread class, implement Runnable interface, use Executorservice, callable, future to achieve the return of the results of

Starting a thread does not return results, regardless of the use of thread or runnable. That is, the run () method of the thread and runnable must have no return value.public void Run () {}Solution:callable and the Future , one produces results,

In Java concurrent programming, if you do not need to monitor the results of the program running, then you can use the Runnable interface, directly to the thread pool can be thrown. Because the Runnabale interface does not have a return value. E.g.1

Callable and Runnable are used in a similar way, the difference being: 1, callable use the call () method, Runnable use the Run () method2, call () has a return value, and the run () method does not return a value.3, call () can throw the checked

1, callable: Callable The task that returns the result and may throw an exception. The implementing person defines a method called call without any arguments. The callable interface is similar to Runnable, both of which are designed for classes

Import java. util. Concurrent. callable; Import java. util. Concurrent. executionexception; Import java. util. Concurrent. futuretask; /**** @ Author kaiwii Ho* The callable class is a task with a returned value.* The relationship between tasks and

Python standard library: built-in functions callable (object), pythoncallable If the object parameter is an object that can be called, True is returned; otherwise, False is returned. However, it should be noted that when an object can be called, it

Pre-recordThe previous review is java5 in the thread pool knowledge, this time is to review with the return value of the callable and future knowledge.Scenarios and codesSince Futuretask implements two interfaces, runnable and future, it can either

The difference between runnable and callable is that(1) The method prescribed by callable is call (), and the method specified by runnable is run ().(2) The callable task can return a value after execution, and Runnable's task is not to return a

Start a thread regardless of whether you use thread or runnable. are not returning the results.That is, the run () method of the thread and runnable must have no return value.public void Run () {}How to resolve:callable and the Future , one

February Home for the New year, home no net, so the blog has stopped for a while, work has been a week, generally still relatively busy! Weekend or not summed up the knowledge points to summarize, easy to read in the future!Callable and

Lin Bingwen Evankaka original works. Reprint please specify the source Http://blog.csdn.net/evankakaIn the previous article, I introduced the thread pool and its internal principles. Today, it is mainly about thread-related content. In general,

Usage scenarios: If you need to get the results of a thread, or do other things after the threads are finished, you can use callable and futrue1. Define a thread pool to submit a single callable task to the thread poolsExecutorservice

Future ModeThe future interface is the implementation of the Java threading future pattern, which can be used for asynchronous computationCallable is responsible for producing results, future is responsible for taking resultsThis can be explained as:

1. BackgroundIn multi-threaded JAVA5, you can use the callable interface to implement a thread with a return value. Use the thread pool's Submit method to submit the callable task, using the future stub returned by the Submit method, to invoke the

About the Python callable object A good article, can't help copy come over, respect the author original, quote as follows: Http://www.jianshu.com/p/a96e71ff7f07 There is an interesting syntax in Python, as long as the type is defined , the call

Department of Technology 2018.4.161. Callable and Thread differencesThe line Cheng Nen that implements the callable interface returns the execution result, and runable is not. Callable's call method allows exceptions to be thrown.Since callable can

The recent project used a feature that needed to implement multi-threaded distribution tasks and required the return value of the task, which had been implemented runnable interface, but the Run method was to return void. Later on the Internet to

1) runnable and callable are the same interface* Callable's task can return a value after execution, and Runnable's task is not to return a value (is void); The call method can throw an exception, and the Run method cannot* Run the callable task to