单链表反转

package xie.struct;
public class LinkedList {
    public static void main(String[] args)
    {
        LinkedList list=new LinkedList();
        for(int i=0;i<15;i++)
        {
            list.AddData(i);
        }
        System.out.println("初始化链表");
        list.toString();
        System.out.println();
        System.out.println("递归反转链表");
        list.Reserve(list.getHead().next);
        list.toString();
        System.out.println();
        System.out.println("常规反转链表");
        list.Reserve2();
        list.toString();
    }
    public class Node{
        int data;
        Node next;
        public Node()
        {
            
        }
        public int getData() {
            return data;
        }
        public void setData(int data) {
            this.data = data;
        }
        public Node getNext() {
            return next;
        }
        public void setNext(Node next) {
            this.next = next;
        }
    }
    private Node head;
    public LinkedList()
    {
        head=new Node();
        head.data=-1;
        head.next=null;
    }
    
    public void AddNode(Node node)
    {
        Node pNode=head;
        while(pNode.next!=null)
        {
            pNode=pNode.next;
        }
        pNode.next=node;
        return;
    }
    public void AddData(int data)
    {
        Node newnode=new Node();
        newnode.data=data;
        newnode.next=null;
        Node pNode=head;
        while(pNode.next!=null)
        {
            pNode=pNode.next;
        }
        pNode.next=newnode;
        return;
        
    }
    public Node Reserve(Node node)
    {
        if(node.next==null)
        {
            this.head.next=node;
            return node;
        }
        Node pre=Reserve(node.next);
        pre.next=node;
        node.next=null;
        return node;
    }
    
    public void Reserve2()
    {
        Node node=this.head.next;
        Node p=node.next;
        Node current;
        while(p!=null)
        {
            current=p;
            p=current.next;
            current.next=this.head.next;
            this.head.next=current;
        }
        node.next=null;
    }
    public String toString()
    {
        Node pNode=head.next;
        while(pNode!=null)
        {
            System.out.print(pNode.data+"-");
            pNode=pNode.next;
        }
        return null;
    }

    public Node getHead() {
        return head;
    }

    public void setHead(Node head) {
        this.head = head;
    }
}