具有可变字符范围的Java RegEx

Question

I need to check if all characters of a string are in a specific character range.

I know I can check with the regular expression:

input.matches("[a-z]+");

if a string only contains letters from a to z . But how can I do it if the character range is defined by an given interface? For example, the interface xxx has the attribute

xxx.FIRST_CHAR = 'a';

and

xxx.LAST_CHAR = 'z';

but the attributes can be changed.

Is there any way to use variable characters in regular expressions?

Answer 1

您可以使用+运算符来连接与连接字符串相同的正则表达式模式。

str.matches(xxx.FIRST_CHAR + "[a-z]*" + xxx.LAST_CHAR);