import java.util.*;
import java.io.*;
 class SimpleLl {
    public int data1;
    public String data2;
    public SimpleLl nextLink;
     public SimpleLl(int d1, String d2)
     {
      data1=d1;
      data2=d2;
     }
     public void printLink()
     {
         System.out.print("the data u entered is:"+data1+"&"+data2);
     }
}
 class Link {
  private SimpleLl first;
  private SimpleLl current;
  //private SimpleLl previous;
   public Link()
   {
       first=null;
      current=null;
       //previous=null;
   }
 public boolean isEmpty()
 {
     return first==null;
 }
  public void insertObject(int ob1, String ob2)
  {
      SimpleLl link=new SimpleLl(ob1,ob2);
      if(isEmpty())
      {
          first=link;
         current=link;
          //previous=link;
      }
      else
      {
         current.nextLink=link;
          current=current.nextLink;
          
      }
  }
  public SimpleLl Delete()
  {
      SimpleLl temp=first;
        first=first.nextLink;
        return temp;
  }
  public void printList() {
            SimpleLl currentLink = first;
            System.out.print("List: ");
            while(currentLink != null) {
                    currentLink.printLink();
                    currentLink = currentLink.nextLink;
            }
            System.out.println("");
  }

  }
  class LinkedTest {
    public static void main(String[] args) throws IOException {
        Link ll = new Link();
        System.out.println("please press one(1) for enter object to the linkedlist:");
        System.out.println("please press one(2) for desplaying object from the linkedlist:");
        System.out.println("please press one(3) for delete object from the linkedlist:");
        System.out.println("please press one(4) for sorting object from the linkedlisr:");
        BufferedReader reader;
        reader = new BufferedReader(new InputStreamReader(System.in));
         int value = Integer.parseInt(reader.readLine());
        switch(value) {
            case 1:
                 System.out.print("enter the object 1 :");
                 int value1 = Integer.parseInt(reader.readLine());
                 System.out.print("enter the object 2 :");
                 String value2= reader.readLine();
                 ll.insertObject(value1,value2);
                // ll.printList();
                 break;
            case 2:
                ll.printList();
                break;
            case 3:
                ll.Delete();
                break;
                 default:
        }
    }
  }