Cola

public class Cola {

    private char[] array = new char[10];
    private int Head;
    private int Tail;
    private int count;

    public Cola() {
        this.Head = 0;
        this.Tail = 0;
    }

    public Cola(int n) {
        this.array = new char[n];
        this.Head = 0;
        this.Tail = 0;
        this.count = 0;
    }

    private int next(int pos) {
         if (++pos >= this.array.length) {
             pos = 0;
         }
         return pos;
     }

    public boolean isEmpty(){
        return this.Head==this.Tail;
    }

    public boolean isFull() {
        return this.Head==this.next(this.Tail);
    }

    public void enQueue(char element){
        if(isFull()) {
            System.out.println("La cola está llena");
        }else {
            this.array[this.Tail]=element;
            this.Tail++;
            this.count++;
            if (this.Tail==this.array.length)this.Tail=0;
        }
    }

    public char deQueue() {
        char eliminado = ' ';
        if(isEmpty()) {
            System.out.println("La cola está vacía");
        }else {
            eliminado = this.array[this.Head];
            this.Head++;
            this.count--;
            if(this.Head==this.array.length)this.Head=0;
        }

        return eliminado;
    }

    public char peek() {
        char primero = ' ';

        if(isEmpty()) {
            System.out.println("La cola está vacía");
        }else {
            primero = this.array[this.Head];
        }

        return primero;
    }

    public int size() {
        return this.count;
    }

    public void tostring() {
        if(isEmpty()) {
            System.out.println("La cola está vacía");
        }else {
            int aux = 0, i= this.Head;
            while(aux < this.size()) {
                System.out.print(this.array[i]+" ");
                aux++;
                i++;

                if(i == this.array.length)i=0;
            }
        }
    }
}