问题
In Java multi threaded applications, we deal with InterruptedThreadException. This Exception is thrown if another thread interrupts the current thread. Now what is the reason another thread might want to interrupt the current thread when it knows that it is going to cause an Exception?
回答1:
Many reasons. But the most popular one is to cancel some task on a thread.
See http://www.ibm.com/developerworks/java/library/j-jtp05236/index.html for details.
回答2:
In most cases, to notify that a Thread should abort. Usually, a worker thread executing some sort of batch operation is implemented in a way that it terminates itself (i.e. exit out of its run() method) when interrupted.
Unfortunately, a lot of programmers simply catch and swallow it which is a very very bad practice. If a Thread is not expecting an InterruptedException it should either re-throw or should restore its interrupted status if it cannot throw it (if restrained by an Interface for example) by calling
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
来源：https://stackoverflow.com/questions/17494717/why-a-thread-would-interrupt-another-thread