为什么要使用泛型？泛型和非泛型对比-白红宇

为什么要使用泛型？泛型和非泛型对比

阅读量：6370 次

发布时间：2019-06-23

本文共 1577 字，大约阅读时间需要 5 分钟。

using System;using System.Collections;using System.Collections.Generic;using System.Diagnostics;using System.Linq;using System.Text;using System.Threading.Tasks;namespace 泛型和非泛型对比{    class Program    {        static void Main(string[] args)        {            testGeneric();            testNonGeneric();            Console.ReadKey();        }        //测试泛型类型操作的运行时间        public static void testGeneric()        {            Stopwatch stopwatch = new Stopwatch();            List
     
       list = new List
      
       ();            stopwatch.Start();            for (int i = 0; i < 10000000; i++)            {                list.Add(i);            }            stopwatch.Stop();            TimeSpan ts = stopwatch.Elapsed;            string elapsedTime = string.Format("{0:00}:{1:00}:{2:00}:{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.TotalMilliseconds / 10);            Console.WriteLine("泛型类型运行的时间：" + elapsedTime);        }        public static void testNonGeneric()        {            Stopwatch stopwatch = new Stopwatch();            ArrayList arraylist = new ArrayList();            stopwatch.Start();            for (int i = 0; i < 10000000; i++)            {                arraylist.Add(i);            }            stopwatch.Stop();            TimeSpan ts = stopwatch.Elapsed;            string elapsetime = string.Format("{0:00}:{1:00}:{2:00}:{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);            Console.WriteLine("非泛型运行的时间：" + elapsetime);        }    }}

运行效果图：