Java : String. 匹配()

Question

我想确定一个字符串是否仅由两个单词组成，它们之间有一个空格字符。第一个词应仅包含字母数字字符。第二个应该只包含数字。一个例子是:asd 15

我想使用 String.matches。我该怎么做或者我应该使用哪个正则表达式？

提前致谢。

Answer 1

你寻找类似的东西:

String regex = "^[A-Za-z]+ [0-9]+$";

解释:

^         the beginning of the string (nothing before the next token)
[A-Za-z]+ at least one, but maybe more alphabetic chars (case insensitive)
          a single space (hard to see :) )
[0-9]+    at least one, but maybe more digits
$         end of the string (nothing after the digits)