如何在Java中使用do while循环来反转循环链表？

class ListNode {
    int val;
    ListNode next;
    
    ListNode(int val) {
        this.val = val;
        this.next = null;
    }
}

public ListNode reverseCircularLinkedList(ListNode head) {
    if (head == null || head.next == null) {
        return head;
    }
    
    ListNode current = head;
    ListNode previous = null;
    ListNode next;
    
    do {
        next = current.next;
        current.next = previous;
        previous = current;
        current = next;
    } while (current != head);
    
    head.next = previous;
    return previous;
}

public static void main(String[] args) {
    ListNode head = new ListNode(1);
    ListNode node2 = new ListNode(2);
    ListNode node3 = new ListNode(3);
    ListNode node4 = new ListNode(4);
    
    head.next = node2;
    node2.next = node3;
    node3.next = node4;
    node4.next = head;
    
    ListNode reversedHead = reverseCircularLinkedList(head);
    
    // 打印反转后的链表
    ListNode current = reversedHead;
    do {
        System.out.print(current.val + " ");
        current = current.next;
    } while (current != reversedHead);
}