leetcode: Remove Linked List Elements(java)

Remove all elements from a linked list of integers that have valueval.

ExampleGiven:1 –> 2 –> 6 –> 3 –> 4 –> 5 –> 6,val= 6Return:1 –> 2 –> 3 –> 4 –> 5

Credits:

Special thanks to@mithmattfor adding this problem and creating all test cases.

弄一个前节点和当前节点，判断清楚状态就可以了。记录一下代码，，以便以后复习。

public static ListNode removeElements(ListNode head, int val) {ListNode preNode = null;ListNode curNode = head;ListNode temp = head;while(curNode != null){if(curNode.val == val){if(preNode!=null){preNode.next = curNode.next;curNode = curNode.next;}else{curNode = curNode.next;temp = curNode;}}else{preNode = curNode;curNode = curNode.next;}}return temp;}

不要等待机会，而要创造机会。