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Frequently Asked Questions

What is the use ofqueue in Java?

Queue in Java. The queue interface is provided in java.util package and it implements the Collection interface. The queue implements FIFO i.e. First In First Out. This means that the elements entered first are the ones that are deleted first.

What is the Queue interface in Java?

The Queue interface is available in java.util package and extends the Collection interface. The queue collection is used to hold the elements about to be processed and provides various operations like the insertion, removal etc.

What is PriorityQueue in Java?

The java.util.PriorityQueue class is an unbounded priority queue based on a priority heap.Following are the important points about PriorityQueue: The elements of the priority queue are ordered according to their natural ordering, or by a Comparator provided at queue construction time, depending on which constructor is used.

How many elements are inserted in a queue in Java?

Five elements are inserted in the queue. Then the queue is displayed. The code snippet that demonstrates this is given as follows − The element from the head of the queue is deleted and it is displayed. Then the size of the queue is displayed.


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