LinkedList is an implementation of linked list and double-ended queue data structures. : LinkedList « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. LinkedList

LinkedList has methods called 
addFirst(), addLast(), getFirst(), getLast(), removeFirst(), and removeLast(). 

import java.util.LinkedList;

public class MainClass {
  public static void main(String[] argv) {
    LinkedList list = new LinkedList();

    list.addFirst("1");
    list.addLast("2");

    System.out.println(list);
  }
}

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