字符串:如何用单个字符替换多个可能的字符? [英] String: How to replace multiple possible characters with a single character?

问题描述

我想用'_'

但是我不喜欢我的代码...

but I don't like my code...

是否有比这更有效的方法:

is there a more efficient way to do this than:

String new_s = s.toLowerCase().replaceAll(" ", "_").replaceAll(".","_");

?

toLowerCase()就在那里，因为我也希望它也小写...

toLowerCase() just there because I want it lower-cased as well...

推荐答案

String new_s = s.toLowerCase().replaceAll("[ .]", "_");

replaceAll is using regular expressions, and using . inside a character class [ ] just recognises a . rather than any character.

这篇关于字符串:如何用单个字符替换多个可能的字符?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！