java - 中断异常发生原因

Question

在查看 Object 类下 notifyAll() 方法的 javadoc 时，出现以下几行:

If the current thread is interrupted by any thread before or while it is waiting, then an InterruptedException is thrown. This exception is not thrown until the lock status of this object has been restored as described above.

重点是:

the current thread is interrupted while it is waiting

这是什么意思？线程在等待时可以被中断吗？如果是，为什么？它有什么用？

Answer 1

Java 中“线程被中断”的含义是指线程的中断标志已被设置，仅此而已。然而，JDK中大多数使线程等待的方法都会立即发现这一点并退出等待状态，抛出InterruptedException。您所读到的方法就是这种情况。