技術標籤：c#入門c#

C#中string和StringBuilder的區別

string類

            string a = "helloworld";
            a.Insert(5, " ");
            string b = a;
            Console.WriteLine(a);
            Console.WriteLine(b);
            a = "keep on never give up.";
            Console.
 
WriteLine(a);
            Console.WriteLine(b);

StringBuilder類

            StringBuilder str1 = new StringBuilder("helloworld");
            str1.Insert(5, " ");
            StringBuilder str2 = str1;
            Console.WriteLine(str1);
            Console.WriteLine(str2);
            str1 =
 
 new StringBuilder("keep on never give up");
            str2 = str1;
            Console.WriteLine(str1);
            Console.WriteLine(str2);

string和StringBuilder執行時間上的區別

            string str = "";
            long stratTime = DateTime.Now.Millisecond;
            for (int i =
 
 0; i < 10000; i++)
            {
                str += i;
            }
            long endTime = DateTime.Now.Millisecond;
            long time = endTime - stratTime;
            Console.WriteLine(time);
            StringBuilder str2 = new StringBuilder("");
            stratTime = DateTime.Now.Millisecond;
            for (int i = 0; i < 10000; i++)
            {
                str2.Append(i);
            }
            endTime = DateTime.Now.Millisecond;
            time = endTime - stratTime;
            Console.WriteLine(time);