Java:String.matches()

Question

我想确定一个字符串是否只包含两个单词,它们之间有一个空格字符.第一个单词应该只包含字母数字字符.第二个应该只包括数字.一个例子是:asd 15

我想用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

你寻找像这样的东西:

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

说明:

^         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)