【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 com.tyxh.link;
//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. out.print( data + " ");
}
}
package com.tyxh.link;
//单链表
public class LinkList {
public Node first; // 定义一个头结点
private int pos = 0;// 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 = 0;
}
// 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 = 0;
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) {
current.display();
current = current. next;
}
System. out.println();
}