在Java中，如果我调用一个类从另一个可运行对象扩展线程，Thread执行？ [英] In Java, if I call a class that extends Thread from another runnable object, which Thread executes?

问题描述

我有一个类Foo扩展Thread，并实现它自己的公共方法称为bar （）以及所需的run（）方法。如果我实现了多个Foo对象，每个对象包含对另一个Foo对象的引用，并且在Foo类的run（）方法中，对于任何具有引用的Foo对象，都是对bar（）方法的调用。如果名为Thread-1的Foo对象调用名为Thread-2的Foo对象上的bar（），那么谁正在Thread-2中执行方法代码？执行是否从Thread-1转移到Thread-2来执行或者Thread-1继续在Thread-2中执行代码？

解决方案

一个新的线程只有在第一个选择你调用 thread.start（）（或使用 executor.submit（runnable））。所有其他方法调用仍保留在当前线程中。

I am working on some concurrency programming and one part is bothering me.

Let's say I have some class Foo that extends Thread and implements it's own public method called bar() as well as the required run() method. If I implement multiple Foo objects, each one containing a reference to another Foo object, and inside the run() method for the Foo class is a call on the bar() method for whatever Foo object it has a reference to. If the Foo object with name "Thread-1" calls bar() on the Foo object with name "Thread-2", then who is actually executing the method code in "Thread-2"? Does execution get handed off from "Thread-1" to "Thread-2" to execute or does "Thread-1" continue executing code in "Thread-2"? If it is the second choice, how can I make it act like the first choice?

解决方案

A new thread is started only if you invoke thread.start() (or use executor.submit(runnable)). All other method invocations remain in the current thread.

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