技術標籤：日記

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using System.Diagnostics;

namespace ConsoleApp1
{
    class Array1
    {
        static void Main(string[] args)
        {
            int[] arr = new int[10];
 

            for (int i = 0; i < 10; i++)
            {
                arr[i] = i;
                Console.Write(arr[i] + " ");
            }
            Console.ReadLine();
            ArrayList a = new ArrayList(10);
            for (int i = 0; i < 15; i++)
            {
                a.Add(i);
 

                Console.WriteLine(a[i] + " ");
            }
            Console.Read();
            //Array1 b = new Array1(20);
            //for (int j = 0; j < 10;  j++)
            //{
            //    b.AddLast(j);
            //}
            //b.AddFirst(66);
            //b.Add(2, 5);
            //b.Remove(2);
 


            //Console.WriteLine(b);
            //Console.Read();
            int m = 10000000;
            Stopwatch t1 = new Stopwatch();
            Stopwatch t2 = new Stopwatch();
            Stopwatch t3 = new Stopwatch();
            Stopwatch t4 = new Stopwatch();
            Console.WriteLine("測試型別物件int");
            t1.Start();
            List<int> l = new List<int>();
            for (int i = 0; i < m ; i++)
            {
                l.Add(i);//不發生裝箱
                int x = l[i];//不發生拆箱
            }
            t1.Stop();
            Console.WriteLine("List'time: "+t1.ElapsedMilliseconds + "ms");
           
            t2.Start();
            ArrayList a = new ArrayList();
            for (int i = 0; i < m; i++)
            {
                a.Add(i);//發生裝箱
                int x = (int)a[i];//發生拆箱
            }
            t2.Stop();
            Console.WriteLine("ArrayList'time: "+t2.ElapsedMilliseconds + "ms");

            Console.WriteLine("測試引用型別物件string");
            t3.Start();
            List<string> l2 = new List<string>();
            for (int i = 0; i < m; i++)
            {
                l2.Add("X");//不發生裝箱
                string x = l2[i];//不發生拆箱
            }
            t3.Stop();
            Console.WriteLine("List'time: " + t3.ElapsedMilliseconds + "ms");

            t4.Start();
            ArrayList a2 = new ArrayList();
            for (int i = 0; i < m; i++)
            {
                a2.Add("X");//發生裝箱
                string x = (string)a2[i];//發生拆箱
            }
            t4.Stop();
            Console.WriteLine("ArrayList'time: " + t4.ElapsedMilliseconds + "ms");
            Console.Read();
        }