Java关于链表的增加、删除、获取长度、打印数值的实现

package com.shb.java;

public class Demo8 {
    public Node headNode = null;
    /**
     * @param args
     * @date 2016-9-28
     * @author shaobn
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Demo8 linkedList = new Demo8();
        linkedList.addNode(1);
        linkedList.addNode(2);
        linkedList.addNode(34);
        linkedList.addNode(14);
//        System.out.println(linkedList.getLength());
        linkedList.deleteNode(1);
        linkedList.printNode();
    }
    /**
     * 插入到链表中
     * @param data
     * @date 2016-9-28
     * @author shaobn
     */
    public void addNode(int data){
        Node node = new Node(data);
        if(headNode==null){
            headNode = node;
            return;
        }
        Node tmpNode = headNode;
        if(tmpNode.next==null){
            tmpNode.next = node;
            return;
        }
        while(tmpNode.next!=null){
            tmpNode = tmpNode.next;
        }
        tmpNode.next = node;
    }
    /**
     * 打印节点的值
     *
     * @date 2016-9-28
     * @author shaobn
     */
    public void printNode(){
        Node tmpNode = headNode;
        while(tmpNode!=null){
            System.out.println(tmpNode.data);
            tmpNode = tmpNode.next;
        }
    }
    /**
     * 删除节点
     *
     * @date 2016-9-28
     * @author shaobn
     */
    public void deleteNode(int index){
        if(index<=0||index>this.getLength()){
            throw new RuntimeException("索引选取不合适");
        }
        int count = 1;
        Node tmpNode = headNode;
        while(tmpNode.next!=null){
            count++;
            if(index==1){
                headNode = tmpNode.next;
                break;
            }
            if(count==index){
                tmpNode.next = tmpNode.next.next;
            }
            tmpNode = tmpNode.next;
            continue;
        }

    }
    /**
     * 获得本链表的长度
     * @return
     * @date 2016-9-28
     * @author shaobn
     */
    public int getLength(){
        int length = 0;
        Node tmpNode = this.headNode;
        while(tmpNode!=null){
            length++;
            tmpNode = tmpNode.next;
        }
        return length;

    }
}
/**
 * 节点的类
 * @author shaobn
 * @date 2016-9-28
 * @package_name com.shb.java
 */
class Node{
    public int data;
    public Node next;
    public Node(int data){
        this.data = data;
    }

}