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Home/ Questions/Q 6211805
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T06:24:08+00:00 2026-05-24T06:24:08+00:00

In Java doc: […] Among the exceptions are priority queues, which order elements according

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In Java doc:

[…] Among the exceptions are priority queues, which order elements according to a supplied comparator, or the elements’ natural ordering, and LIFO queues (or stacks) which order the elements LIFO (last-in-first-out)

How implementation of java.util.queue uses LIFO instead of FIFO?

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  1. Editorial Team
    Editorial Team
    2026-05-24T06:24:09+00:00Added an answer on May 24, 2026 at 6:24 am

    Stack and LinkedList offered here are just a collections. Queue is not a collection. It is a part of concurrency package and can be used with threadpools.

    I have just verified again and read javadoc that you have quoted. I think that the only option to use LIFO queue is to use priority queue with custom comparator that compare elements according to the insertion time in reverse order.

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