java二维数组队列怎么用

public class ArrayQueue2D {
    private int[][] queue;
    private int front, rear;

    public ArrayQueue2D(int rows, int columns) {
        queue = new int[rows][columns];
        front = -1;
        rear = -1;
    }

    public void enqueue(int data) {
        if (isFull()) {
            throw new ArrayIndexOutOfBoundsException("Queue is full");
        }
        if (front == -1) {
            front = rear = 0;
        } else {
            rear++;
        }
        queue[front][rear] = data;
    }

    public int dequeue() {
        if (isEmpty()) {
            throw new ArrayIndexOutOfBoundsException("Queue is empty");
        }
        int data = queue[front][rear];
        if (front == rear) {
            front = rear = -1;
        } else {
            rear--;
        }
        return data;
    }

    public boolean isEmpty() {
        return front == -1;
    }

    public boolean isFull() {
        return rear == queue[0].length - 1;
    }
}