java利用循环双链表设计队列的代码怎么写

这是一个技术问题，我可以回答。以下是利用循环双链表设计队列的 Java 代码：

public class Queue {
    private Node head, tail;
    private int size;

    public Queue() {
        head = null;
        tail = null;
        size = 0;
    }

    public boolean isEmpty() {
        return head == null;
    }

    public int getSize() {
        return size;
    }

    public void enqueue(int data) {
        if (tail == null) {
            tail = new Node(data);
            head = tail;
            head.prev = tail;
            tail.next = head;
        } else {
            Node newNode = new Node(data);
            newNode.prev = tail;
            newNode.next = head;
            tail.next = newNode;
            head.prev = newNode;
            tail = newNode;
        }
        size++;
    }

    public int dequeue() {
        if (isEmpty()) {
            throw new NoSuchElementException("Queue is empty");
        }
        int data = head.data;
        head = head.next;
        tail.next = head;
        head.prev = tail;
        size--;
        return data;
    }

    private class Node {
        int data;
        Node prev, next;

        public Node(int data) {
            this.data = data;
            prev = null;
            next = null;
        }
    }
}

以上代码利用循环双链表实现了一个简单的队列。请注意，这只是一个示例，实际应用中需要根据具体需求修改。