Question
What are the differences between Queue and Stack in java?
Answers
A collection designed for holding elements prior to processing.
Besides basic Collection operations, queues provide additional insertion, extraction, and inspection operations.

Queues typically, but do not necessarily, order elements in a FIFO (first-in-first-out) manner.
Stack is also a form of Queue but one difference, it is LIFO (last-in-first-out).
Whatever the ordering used, the head of the queue is that element which would be removed by a call to remove() or poll(). Also note that Stack and Vector are both synchronized.

Usage:
Use a queue if you want to process a stream of incoming items in the order that they are received.Good for work lists and handling requests.

Use a stack if you want to push and pop from the top of the stack only. Good for recursive algorithms.   Your Comment




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