当线程被终止 ( Thread.State.TERMINATED) 时，它仍然没有被中断。为什么？

我找到了这个，我找到了这个，但都没有回答我的问题。_{我已经在 OpenJDK 11 和 Oracle JDK 16 上尝试过这个 - 没有区别，结果相同。}

我已经使用 Java 10 多年了，多线程任务对我来说一直很清楚；然而，意外地，我遇到了一些奇怪的事情（对我来说），我很想知道。

我明白了，那private volatile boolean interrupted;是刚刚下课的标志（场）Thread，这我能在结合使用interrupt()时，以代码的一些逻辑了的情况下isInterrupted()获得true。

但是，为什么Thread.State.TERMINATEDstate 不也创建相同的线程interrupted？

public class MainClass {

    public static void main(String[] args) throws Exception {
        Thread alfa = new Thread(() -> {
            for (int i = 0; i < 3; i++) {
                System.out.println(i + ". " + Thread.currentThread().getName() + " state: " + Thread.currentThread().getState().name());
                try {Thread.sleep(1000);} catch (Exception e) {}
            }
        });
        alfa.setName("Alfa thread");
        System.out.println(alfa.getName() + " state before invoking .start() is: " + alfa.getState().name());
        alfa.start();
        int i = 0;
        while (true) {
            ++i;
            System.out.println(i + ". " + alfa.getName() + " state: " + alfa.getState().name());
            System.out.println(i + ". " + alfa.getName() + " is interrupted?: " + alfa.isInterrupted());
            Thread.sleep(1000);
        }
    }
}

证明，这：

Alfa thread state before invoking .start() is: NEW
1. Alfa thread state: RUNNABLE
0. Alfa thread state: RUNNABLE
1. Alfa thread is interrupted?: false
1. Alfa thread state: RUNNABLE
2. Alfa thread state: TIMED_WAITING
2. Alfa thread is interrupted?: false
2. Alfa thread state: RUNNABLE
3. Alfa thread state: TIMED_WAITING
3. Alfa thread is interrupted?: false
4. Alfa thread state: TERMINATED //alfa is terminated!
4. Alfa thread is interrupted?: false //alfa is not interrupted. Seriously?

• 我是不是没有得到一些东西，这是故意这样做的，因为它在幕后有一些想法？或者
• 这只是一些忘记正确实施的东西吗？

回答

public void reallyLongOperation() throws InterruptedException {
  // the thread will stay in the loop for a long time
  while(!taskFinished){
    //stuff repeated for many cycles
    if(Thread.interrupted()){
      throw new InterruptedException("The really long operation has been interrupted");
    }
  }
}