public class Queue{

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

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

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

    public void dequeue() {
        if (isEmpty()) {
        } else {
            front++;
            if (front == capacity) {
                front = 0;
            }
            currentSize--;
        }
    }

    public boolean isFull() {
        if (currentSize == capacity) {
            return true;
        }
        return false;
    }

    public boolean isEmpty() {

        if (currentSize == 0) {
            return true;
        }
        return false;
    }

    public int size(){return currentSize;}

    public void show(){
        if(isEmpty()){
            System.out.print("Kosong");
            return;
        }
        int i=front;
        while(i<=rear){
            System.out.print(queueArr[i]);
            if(i!=rear) System.out.print(", ");
            i++;
        }
    }
}