为什么Thread.interrupt（）不能中断试图获取锁的线程 [英] Why can't Thread.interrupt() interrupt a thread trying to acquire lock

问题描述

在Thinking in Java一书中写道， Thread.interrupt（）无法中断试图获取同步锁的线程，我想知道为什么？

In the book Thinking in Java it is written that Thread.interrupt() cannot interrupt a thread which is trying to acquire a synchronized lock, I want to know why?

推荐答案

只有在声明抛出阻塞操作时才能中断阻塞操作 InterruptedException 。显然， synchronized 块不会声明它，因此在等待获取锁定时无法中断线程。

A blocking operation can be interrupted only if it is declared to throw InterruptedException. Clearly, a synchronized block does not declare it, therefore it is impossible to interrupt a thread while it is waiting to acquire a lock.

或者你可以使用显式锁并调用 Lock.lockInterruptibly（）。

Alternatively you can use an explicit lock and call Lock.lockInterruptibly().

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