Java 集合 从LinkedList获取第一个和最后一个元素

import java.util.LinkedList;
public class GetFirstAndLast {

 public static void main(String[] args) {

    // Create a LinkedList
    LinkedList<String> linkedlist = new LinkedList<String>();

    // Add elements to LinkedList
    linkedlist.add("Item1");
    linkedlist.add("Item2");
    linkedlist.add("Item3");
    linkedlist.add("Item4");
    linkedlist.add("Item5");
    linkedlist.add("Item6");

    // Getting First element of the List
    Object firstElement = linkedlist.getFirst();
    System.out.println("First Element is: "+firstElement);

    // Getting Last element of the List
    Object lastElement = linkedlist.getLast();
    System.out.println("Last Element is: "+lastElement);
 }
}

First Element is: Item1
Last Element is: Item6