node.java

this program is about logic and have 4 class. for execute this program use of link list.

public class node
{
    private  String st1;
    private  String st2;
    public   node next;
    public   node prev;

    public  node()
    {

        this.prev=this.next=null;
        this.setSt1("");
        this.setSt2("");
        
    }
    public  void setSt1(String s)
    {
          st1=s;
    }
    public  String getSt1()
    {
        return st1;
    }

    public  void setSt2(String s)
    {
          st2=s;
    }
    public  String getSt2()
    {
        return st2;
    }
   

}