java链表

1 class Node{
2     Node next = null;
3     int data;
4     public Node(int data){this.data = data;}
5 }

 1 public class MylinkedList{
 2     Node head = null;
 3 
 4     //向链表中插入数据
 5     public void addNode(int d){
 6         Node newNode = new Node(d);
 7         if(head == null){
 8             head = newNode;
 9         return;
10         }
11         Node tmp = head;
12         while(tmp.next != null){
13             tmp = tmp.next;
14         }
15         //add node to end
16         tmp.next = newNode;
17     }
18 
19 
20     //删除第index个节点
21     public Boolean deleteNode(int index){
22         if(index<1 || index>length()){
23             return false;
24         }
25         //删除链表第一个元素
26         if(index == 1){
27             head = head.next;
28             return true;
29         }
30         int i = 1;
31         Node preNode = head;
32         Node curNode = preNode.next;
33         while(curNode != null){
34             if(i == index){
35                 preNode.next = curNode.next;
36                 return true;
37             }
38             preNode = curNode;
39             curNode = curNode.next;
40             i++;
41         }
42         return true;
43     }
44 
45     //返回节点长度
46     public int length(){
47         int length = 0;
48         Node tmp = head;
49         while (tmp != null) {
50             length++;
51             tmp = tmp.next;
52         }
53         return length;
54     }
55 
56 
57     //对链表进行排序
58     public Node orderList(){
59         Node nextNode = null;
60         int temp = 0;
61         Node curNode = head;
62         while(curNode.next != null){
63             nextNode = curNode.next;
64             while(nextNode != null){
65                 if(curNode.data > nextNode.data){
66                     temp = curNode.data;
67                     curNode.data = nextNode.data;
68                     nextNode.data = temp;
69                 }
70                 nextNode = nextNode.next;
71             }
72             curNode = curNode.next;
73         }
74         return head;
75     }
76 }