queue

public class Queue {

    private int capacity;
    char queueArr[];
    int front;
    int rear;
    int currentSize = 0;

    public Queue(int sizeOfQueue) {
        this.capacity = sizeOfQueue;
        front = 0;
        rear = -1;
        queueArr = new char[this.capacity];
    }

    public void enqueue(char data) {
        if (!isFull()){
            rear++;
            if (rear == capacity) {
                rear = 0;
            }
            queueArr[rear] = data;
            currentSize++;
        }
    }