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java多线程之FutureTask、Future、CompletableFuture

前面已经在多线程创建的时候有提到Future和FutureTask的简单用法，这里详细介绍下FutureTask以及CompletableFuture 一、FutureTask 1、FutureTask简介 FutureTask除了实现Future接口外，还实现了Runnable接口。因此，Futu...

Java多线程专题之Callable、Future与FutureTask(含源码分析)

前言大家好，一直以来我都本着用最通俗的话理解核心的知识点, 我认为所有的难点都离不开基础知识的铺垫。目前正在出一个Java多线程专题长期系列教程，从入门到进阶, 篇幅会较多, 喜欢的话，给个关注❤️ ~适合人群有一定的Java基础想学习或了解多线程开发想提高自己的同学大佬可以绕过 ~背景之前给大...

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JUC-Java多线程Future，CompletableFuture

多线程相关概念1把锁：synchronized2个并：并发（concurrent）在同一实体上的多个事件，在一台处理器上“同时处理多个任务”，同一时刻，其实是只有一个时间在发生并行（parallel）在不同实体上的多个时间，在多台处理器上同时....

Java多线程开发 - Future的使用与理解

Future模式是什么Future模式是多线程开发中非常常见的一种设计模式。它的核心思想是异步调用。当我们需要调用一个函数方法时。如果这个函数执行很慢,那么我们就要进行等待。但有时候,我们可能并不急着要结果。因此,我们可以让被调用者立即返回,让他在后台慢慢处理这个请求。对于调用者来说,则可以先处理一...

Java多线程 Future和FutureTask的区别

一、说明Future和FutureTask的关系Future 是一个接口，无法直接创建对象，需配合线程池使用.submit()方法返回值Future来保存执行结果；而使用.execute()方法传入Runnable接口无返回值FutureTask 是一个类，可以直接创建对象，其实现了Runnable...

Java多线程 Callable和Future

一、说明Java 提供了三种创建线程的方法实现 Runnable接口继承 Thread类本身通过 Callable和 Future 创建线程Callable和Future的引入继承Thread或实现Runnable接口，任务执行完成后无法获取执行结果而要获取执行结果，必须通过共享变量或者使用线程通信...

Java多线程编程简明教程(1) - Future模式与AsyncTask

Java多线程编程简明教程缘起关于多线程编程的教程汗牛充栋了，比如阿里集团内部就有一粟、高铁等大牛的讲座，更不用说有清英同学专门创建了并发编程网站来专注于这件事情。专门讲Java并发开发的书籍也是相当丰富了。我们举个例子，典型的一本Java多线程开发的教材是这样写的，上来就是介绍如何创建线程，然...

Java多线程Future与CompletableFuture-异步获取接口返回结果

背景：当调用一些耗时接口时，如果我们一直在原地等待方法返回，整体程序的运行效率会大大降低。可以把调用的过程放到子线程去执行，再通过 Future 去控制子线程的调用过程，最后获取到计算结果。提高整个程序的运行效率。创建线程池：@Configuration public class ExecutorC...

Java多线程之Executor框架:Callable、Future、Executor和ExecutorService

引言 Executor框架是指JDK 1.5中引入的一系列并发库中与Executor相关的功能类，包括Executor、Executors、ExecutorService、Future、Callable等。一、为什么要引入Executor框架？ 1、如果使用new Thread(...).star...

Java多线程设计模式(5)Future模式

一 Future Pattern 假如有一个执行起来需要花费一些时间的方法，为了省去不必要的等待执行结果出来，继续做别的事情，则可以事先获取一个“提货单”即Future参与者，Future Pattern模式也就是这样的方式，当一个线程需要另一个线程的处理的结果时候，则不必...

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