单链表翻转Java实现

public static LinkNode reverseLinkList(LinkNode head){
if(head == null || head.next == null)
return null;
LinkNode pre = head;
LinkNode q = head.next;
head.next = null;
while(q != null){
LinkNode nxt = q.next;
q.next = pre;
pre = q;
q = nxt;
}
return pre;
}

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