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用java简单的实现单链表的基本操作


发布日期:2019年10月31日
 
用java简单的实现单链表的基本操作

此代码仅供参考如有疑问欢迎评论

package comtyxhlink;

//节点类

public class Node {

protected Node next; //指针域

protected int data;//数据域

public Node( int data) {

this data = data;

}

//显示此节点

public void display() {

System outprint( data +

}

}

package comtyxhlink;

//单链表

public class LinkList {

public Node first; // 定义一个头结点

private int pos = ;// 节点的位置

public LinkList() {

this first = null;

}

// 插入一个头节点

public void addFirstNode( int data) {

Node node = new Node(data)

node next = first;

first = node;

}

// 删除一个头结点并返回头结点

public Node deleteFirstNode() {

Node tempNode = first;

first = tempNode next;

return tempNode;

}

// 在任意位置插入节点 在index的后面插入

public void add(int index int data) {

Node node = new Node(data)

Node current = first;

Node previous = first;

while ( pos != index) {

previous = current;

current = current next;

pos++;

}

node next = current;

previous next = node;

pos = ;

}

// 删除任意位置的节点

public Node deleteByPos( int index) {

Node current = first;

Node previous = first;

while ( pos != index) {

pos++;

previous = current;

current = current next;

}

if(current == first) {

first = first next;

} else {

pos = ;

previous next = current next;

}

return current;

}

// 根据节点的data删除节点(仅仅删除第一个)

public Node deleteByData( int data) {

Node current = first;

Node previous = first; //记住上一个节点

while (current data != data) {

if (current next == null) {

return null;

}

previous = current;

current = current next;

}

if(current == first) {

first = first next;

} else {

previous next = current next;

}

return current;

}

// 显示出所有的节点信息

public void displayAllNodes() {

Node current = first;

while (current != null) {

currentdisplay()

current = current next;

}

System outprintln()

}

// 根据位置查找节点信息

public Node findByPos( int index) {

Node current = first;

if ( pos != index) {

current = current next;

pos++;

}

return current;

}

// 根据数据查找节点信息

public Node findByData( int data) {

Node current = first;

while (current data != data) {

if (current next == null)

return null;

current = current next;

}

return current;

}

}

package comtyxhlink;

//测试类

public class TestLinkList {

public static void main(String[] args) {

LinkList linkList = new LinkList()

linkListaddFirstNode(

linkListaddFirstNode(

linkListaddFirstNode(

//

linkListadd( //

linkListadd( //

linkListadd( //

linkListdisplayAllNodes()

// Node node = linkListdeleteFirstNode()

// Systemoutprintln(node : + nodedata)

// linkListdisplayAllNodes()

// node = linkListdeleteByPos(

// Systemoutprintln(node : + nodedata)

// linkListdisplayAllNodes()

// linkListdeleteFirstNode()

Node node = linkListdeleteByData(

// Node node = linkListdeleteByPos(

System outprintln( node : + node data)

linkListdisplayAllNodes()

Node node = linkListfindByPos(

System outprintln( node: + node data)

Node node = linkListfindByData(

System outprintln( node: + node data)

}

}

               

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