compareTo（）方法如何比较字符串？ [英] How does the compareTo() method, compare strings?

问题描述

如果我要比较字符串Hello和World。

Such as if I were to compare the Strings "Hello" and "World".

它如何知道Hello比世界更大？

How does it know Hello is greater than World?

我唯一想到的是，也许它使用ASCII表作为参考？

The only thing I can come up with is, maybe it uses the ASCII Table as reference?

感谢您的帮助！

推荐答案

它比较两个字符串 lexographically 。
在字符串API 。

it compares two strings lexographically. check here in the String API.

如果两个字符串不同，则它们具有不同的
字符在某个索引处，它是两个字符串的有效索引，或者
，它们的长度不同，或两者兼而有之。如果他们在一个或多个索引位置有不同的
字符，那么让k为最小的
索引;然后是位置k的字符具有较小的
值的字符串，通过使用<运算符，按字典顺序
在另一个字符串之前。

If two strings are different, then either they have different characters at some index that is a valid index for both strings, or their lengths are different, or both. If they have different characters at one or more index positions, let k be the smallest such index; then the string whose character at position k has the smaller value, as determined by using the < operator, lexicographically precedes the other string.

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