49. Code for a GenericQueue class that implements a queue

• 
  import java.util.LinkedList;
  
  public class GenericQueue<E> {
      private LinkedList<E> list = new LinkedList<>();
  
      public void push(E item)
      {
          list.addLast(item);
      }
  
      public E pull()
      {
          return list.removeFirst();
      }
  
      public int size()
      {
          return list.size();
      }
  }