扩展Thread类并实现Runnable接口的方案 [英] Scenario of extending Thread class and implementing Runnable interface

问题描述

我是Java线程编程的新手，因此这是一个基本问题. (我检查了一下，但找不到以前问过的问题)

I am new to thread programming in Java and hence this basic question. (I checked, but could not find this question previously asked)

我读到可以通过继承Thread类或实现Runnable接口来创建线程. 我看到了两个代码都属于同一类.

I read that threads can be created either by inheriting the Thread class or by implementing the Runnable interface. I saw a code which had both to the same class.

public class ThreadExample extends Thread implements Runnable {
}

我想知道什么样的情况会发生什么，如果这有什么好处，那会是什么.

I was wondering what kind of situation would want this and if there is any advantage to this, what is it.

推荐答案

扩展Thread 和实现Runnable是没有用的(Thread已经实现了Runnable).您几乎总是 想要实现Runnable(并且 not 扩展Thread).这样，您可以灵活地直接使用Thread(不推荐)或使用java.util.concurrent中较新的ThreadPool实现之一(推荐).

extending Thread and implementing Runnable is useless (Thread already implements Runnable). You pretty much always want to implement Runnable (and not extend Thread). That gives you the flexibility of using a Thread directly (not recommended) or using one of the newer ThreadPool implementations in java.util.concurrent (recommended).

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