Comments (5)
这句话是在哪篇文章中的?
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java集合框架中的Queue的介绍里的
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队列先进先出,从队尾插入,队头取出。所以队头存在时间最长。可能与常规理解的有出入。改成从队头插入,队尾取出,队头时间最短,队尾时间最长,是不是更好理解一些?
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如果队列只插入元素而不取出元素的话,可以说队头元素在队列中保存的时间最长,因为是最先插入却又一直没被取出。
"队列的尾部是保存在队列中存放时间最短的元素"对于这句话我的理解是:既然队列是按照顺序依次从队头取出的,那么尾部存放的元素也是在队头元素取出后,依次向前移,但仍保存在队列中,怎么能称之为队尾时间最短呢?
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同一时间下,一个队列中,队头已经存在队列中的时间为最长,队尾已经存在队列中的时间也最短。
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