Java实现删除有序链表中的重复出现的元素 -----(笔记)
public class Solution {
/**
*
* @param head ListNode类
* @return ListNode类
*/
public ListNode deleteDuplicates (ListNode head) {
if(head == null){
return null;
}
ListNode end = new ListNode(-1);
end.next = head;
ListNode pre = end;
ListNode temp = head;
while(temp!=null && temp.next!=null){
if(temp.val == temp.next.val){
while(temp!=null && temp.next!=null && temp.val == temp.next.val){
temp = temp.next;
}
pre.next = temp.next;
temp = temp.next;
}else{
temp = temp.next;
pre = pre.next;
}
}
return end.next;
}
}