enqueue and dequeue in java using array

certainly! in this tutorial, we'll explore the concepts of enqueue and dequeue in java using an array-based implementation. we'll cover the following topics:

1. **understanding queue**: definition and characteristics.
2. **array-based queue**: implementation using a fixed-size array.
3. **enqueue operation**: adding an element to the queue.
4. **dequeue operation**: removing an element from the queue.
5. **code example**: complete implementation of the queue.

1. understanding queue

a **queue** is a linear data structure that follows the first in first out (fifo) principle. this means that the first element added to the queue will be the first one to be removed.

2. array-based queue

an array-based queue uses a fixed-size array to store its elements. we'll maintain two pointers (or indices):
- `front`: points to the front element of the queue (the element to be dequeued).
- `rear`: points to the last element added to the queue (the position where the next element will be enqueued).

3. enqueue operation

the **enqueue** operation adds an element to the rear of the queue. before adding an element, we need to check if the queue is full to avoid overflow.

4. dequeue operation

the **dequeue** operation removes an element from the front of the queue. before removing an element, we need to check if the queue is empty to avoid underflow.

5. code example

here is a simple implementation of a queue using an array in java:

explanation of the code

1. **class declaration**: the `arrayqueue` class encapsulates the queue's properties and methods.

2. **constructor**: initializes the queue with a specified capacity and sets the front and rear pointers.

3. **enqueue method**: adds an element to the rear of the queue. it checks if the queue is full before adding the element.

4. **dequeue method**: removes an element from the front of the queue. it checks if the queue is empty before removing the element.

5. **peek method**: returns the front element without re ...

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