Java use in Elements of Linked List program

Get elements of a LinkedList

import java.util.*;

public class Main 

{

   private LinkedList list = new LinkedList();

   public void push(Object v) 

  {

      list.addFirst(v);

   }

   public Object top() 

   {

      return list.getFirst();

   }

   public Object pop() 

   {

      return list.removeFirst();

   }

   public static void main(String[] args) 

   {

      Main stack = new Main();

      for (int i = 30; i < 40; i++)

         stack.push(new Integer(i));

      System.out.println(stack.top());

      System.out.println(stack.pop());

      System.out.println(stack.pop());

      System.out.println(stack.pop());

   }

}

Clear elements of Linked List

import java.util.*;

public class Main 

{

   public static void main(String[] args) 

     {

      LinkedList lList = new LinkedList();

      lList.add("one");

      lList.add("two");

      lList.add("three");

      lList.add("four");

      lList.add("five");

      System.out.println(lList);

      lList.subList(2, 4).clear();

      System.out.println(lList);

   }

}