Thread类的interrupted方法和isInterrupted方法的区别

 如下所示，interrupted（）会改变线程的中断状态(清除)，而isInterrupted（）不影响线程的中断状态

   /** * Tests whether the current thread has been interrupted.  The 
* <i>interrupted status</i> of the thread is cleared by this method.  In 
* other words, if this method were to be called twice in succession, the 
* second call would return false (unless the current thread were 
* interrupted again, after the first call had cleared its interrupted 
* status and before the second call had examined it). 
* * <p>A thread interruption ignored because a thread was not alive 
* at the time of the interrupt will be reflected by this method
 * returning false. 
* * @return  <code>true</code> if the current thread has been interrupted;
 *          <code>false</code> otherwise. * @see #isInterrupted() * @revised 6.0 */

public static boolean interrupted() {
    return currentThread().isInterrupted(true);
}
 

/** * Tests whether this thread has been interrupted.  The <i>interrupted 
* status</i> of the thread is unaffected by this method. 
* * <p>A thread interruption ignored because a thread was not alive
 * at the time of the interrupt will be reflected by this method 
* returning false. * * @return  <code>true</code> if this thread has been interrupted;
 *          <code>false</code> otherwise. * @see     #interrupted() * @revised 6.0 */

public boolean isInterrupted() 
{    return isInterrupted(false);}



/** * Tests if some Thread has been interrupted.  The interrupted state 
* is reset or not based on the value of ClearInterrupted that is * passed. */

private native boolean isInterrupted(boolean ClearInterrupted);