【LinkedList】

package com.yjf.esupplier.common.test;

import java.util.LinkedList;

/**
 * @author shusheng
 * @description
 * @Email shusheng@yiji.com
 * @date 2018/12/12 15:24
 */
public class LinkedListDemo {
    /**
     * LinkedList
     * 底层数据结构是链表，查询慢，增删快线程不安全，效率高
     * LinkedList 类特有功能
     *  public void addFirst(E e) 及 addLast(E e)
     *  public E getFirst()及getLast()
     * public E removeFirst()及public E removeLast()
     */
    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");
        // 输出对象名
        System.out.println("link:" + link);

        // public void addFirst(Object e)
        link.addFirst("javaee");
        // public void addLast(Object e)
        link.addLast("android");
        // 输出对象名
        System.out.println("link:" + link);

        // public Object getFirst()
        System.out.println("getFirst:" + link.getFirst());
        // public Obejct getLast()
        System.out.println("getLast:" + link.getLast());

        // public Object removeFirst()
        System.out.println("removeFirst:" + link.removeFirst());
        // public Object removeLast()
        System.out.println("removeLast:" + link.removeLast());
        // 输出对象名
        System.out.println("link:" + link);

    }

}