String.CompareTo（）返回意外值 [英] String.CompareTo() returns unexpected value

问题描述

在使用string.CompareTo（）比较两个字符串进行排序时，出现了意想不到的结果。



在主方法中粘贴下面的代码。

While comparing two strings for sorting using string.CompareTo(), unexpected result comes.

Paste below code in the main method.

String str9 = "Output 9";
String str11 = "Output 11";

int nine_11 = str9.CompareTo(str11);

返回的值是一（1）表示str9大于str11。但是，我原以为-1。



任何想法都可以解决这个问题。

The value returned is one(1) means str9 is greater than str11. However, I was expecting it to be -1.

Any idea to overcome this.

推荐答案

这是正确的，它被称为词典比较。正如 Richard 指出的那样，字符'1'小于字符'9'。

您（可能）期望的是组合比较，即标题上的词典字符串（即输出）和尾随的数字（9，11）。这不是自动的，你必须自己编写一些（简单的）代码。

That is correct, it is called lexicographic comparison. As Richard pointed out, the character '1' is less than character '9'.
What you (possibly) expected was a combined compare, that is lexicographic on the heading strings (that is "Output ") and numeric on the trailing ones ( "9", "11"). That is not automatic you have to write yourself some (simple) code.

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