[嵌入式]java Thread的interrupt()、interrupted()、isInterrupted

1. interrupt() 中断线程
   如果当前线程实例被标记为interrupted，则在调用wait、join或者sleep相关方法，并且正在阻塞状态中时，此中断状态会被清除，并触发InterruptedException。
2. isInterrupted() 判断是否中断了
3. Thread.interrupted() 判断是否中断了, 如果中断了会清除中断标志位

    public void interrupt() {
        if (this != Thread.currentThread())
            checkAccess();

        synchronized (blockerLock) {
            Interruptible b = blocker;
            if (b != null) {
                interrupt0();           // Just to set the interrupt flag
                b.interrupt(this);
                return;
            }
        }
        interrupt0();
    }
    
    public static boolean interrupted() {
        return currentThread().isInterrupted(true);
    }

    public boolean isInterrupted() {
        return isInterrupted(false);
    }
    
    private native boolean isInterrupted(boolean ClearInterrupted);