- 分享一下我用java实现的链表
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152public class LinkList<T> {
private Node<T> head; //头节点
private Node<T> tail; //尾节点
/**
* 构造空链表
*/
public LinkList(){
head = tail = null;
}
/**
* 链表内部的节点类
*/
private static class Node<T>{
T data; //节点的数据
Node<T> next; //该节点指向下一个节点的指针
Node(T data){
this.data = data;
this.next = null;
}
}
/**
* 为空链表增加头节点
*/
public void addHead(T point){
this.head = new Node<T>(point);
if(tail == null){
tail = head;
}
}
/**
* 为链表增加尾节点
*/
public void addTail(T point){
tail = new Node<T>(point);
head.next = tail;
}
/**
* 插入节点(头插法)
*/
public void addNode(T point){
if(this.head==null) //添加头节点
addHead(point);
else if(this.tail==this.head) //在头节点后添加尾节点
addTail(point);
else{
Node<T> newNode = new Node<T>(point);
newNode.next = head.next;
head.next = newNode;
}
}
/**
* 删除节点(通过数据值)
*/
public void deleteNode(T data){
Node<T> curr = head ,pre = null;
boolean flag = false; //判断要删除的节点是否存在
while(curr != null){
if(curr.data.equals(data)){
if (curr==head){ //删除头节点
System.out.println("delete the head Node");
head = curr.next;
flag = true;
}else if (curr==tail){ //删除尾节点
System.out.println("delete the tail Node");
tail = pre;
pre.next = null;
flag = true;
}else { //删除中间节点
System.out.println("delete the center Node");
pre.next = curr.next;
flag = true;
}
}
pre = curr;
curr = curr.next;
}
if (flag == false)
System.out.println("链表中不存在该数据");
}
/**
* 查找链表中的元素(通过位置)
*/
public void findKth(T point){
Node<T> curr = head , pre = null;
int k = 1;
boolean flag = false;
while (curr != null){
if(point.equals(k)){
System.out.println("第"+k+"位的值是"+curr.data);
flag = true;
}
pre = curr;
curr = curr.next;
k++;
}
if(flag==false)
System.out.println("查找的位置在链表中不存在");
}
/**
* 查找链表中的元素(通过值)
*/
public void findByValue(T data){
Node<T> curr = head ;
int k = 1;
boolean flag = false;
while(curr!=null){
if(curr.data==data){
System.out.println("查找的值在链表中的第"+k+"位");
flag = true;
}
curr = curr.next;
k++;
}
if(flag==false)
System.out.println("查找的值在链表中不存在");
}
/**
* 输出链表
*/
public void printlnLink(){
Node<T> curr = this.head;
if(curr==null){
System.out.println("linklist is null");
}else{
while(curr!=null){
System.out.print(curr.data+" ");
curr = curr.next;
}System.out.println();
}
}
public static void main(String[] args){
LinkList linkList = new LinkList<Integer>();
linkList.addNode(5);
linkList.addNode(8);
linkList.addNode(10);
linkList.addNode(6);
linkList.addNode(9);
System.out.println("TailNode: "+linkList.tail.data);
linkList.deleteNode(8);
linkList.printlnLink();
linkList.findByValue(5);
linkList.findKth(10);
System.out.print("");
}
}