Java Program to Implement Queue using Array

A queue is a linear list of elements in which deletions can take place only at one end, called the front of the stack, and insertion can take place only at the other end, called the rear. The term FRONT and REAR are used in describing a linear list only when it is implanted as queue. Queues are also called First in First out (FIFO) Lists. This makes the queue a First-In-First-Out (FIFO) data structure.

In a FIFO data structure, the first element added to the queue will be the first one to be removed. This is equivalent to the requirement that once an element is added, all elements that were added before have to be removed before the new element can be invoked.

A queue is an example of a linear data structure. Queues provide services in computer science, transport, and operations research where various entities such as data, objects, persons, or events are stored and held to be processed later. In these contexts, the queue performs the function of a buffer. Queues are common in computer programs, where they are implemented as data structures coupled with access routines, as an abstract data structure or in object-oriented languages as classes. Common implementations are circular buffers and linked lists.

Queue Data Structure  

Put (theObject) : Inserts an element into rear of the queue.
Remove ( ) : Deletes an element from the front of the queue.


When you run the program, the output will be:

Queue is full
Queue is full

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