集合框架_LinkedList的特有功能

package cn.itcast_03;

import java.util.LinkedList;

/*3
 * LinkedList特有功能:
 *     A:添加功能
 *       public void addFirst(Object obj):
 *       public void addLast(Object obj):
 *     B:获取功能
 *       public Object getFirst():
 *       public Object getLast():
 *     C:删除功能
 *     public Object removeFirst():
 *     public Object removeLast():     
 */
public class LinkedListDemo {
  public static void main(String[] args) {
    // 创建集合对象
    LinkedList link = new LinkedList();

    // 添加元素
    link.add("hello");
    link.add("world");
    link.add("java");

    // public void addFirst(Object obj):
    // link.addFirst("javaee");
    // public void addFirst(Object obj):
    // link.addLast("C#");

    // public Object getFirst():
    // String s = (String) link.getFirst();
    // System.out.println(s);
    // public Object getLast():
    // String s = (String) link.getLast();
    // System.out.println(s);

    // public Object removeFirst():
    // String s = (String) link.removeFirst();
    // System.out.println(s);
    // public Object removeLast():
    String s = (String) link.removeLast();
    System.out.println(s);

    // 输出对象名
    System.out.println("like:" + link);
  }
}