正则表达式匹配模式与java中的子域

Question

I am trying to match the sub domain and domain. i used this code.

public static void main(String[] args) {
        String s = "http://aaa.example.com";
        Pattern pattern = Pattern.compile("http://([a-z0-9]*.)example.com");
        Matcher matcher = pattern.matcher(s);
        if (matcher.find()) {
            System.out.println("match");
        }

    }

this works for http://aaa.example.com and also for http://aaa.example.commm . need to match only the sub domain for example.com UPDATE : Thanks for the answers and it works now i am facing another issue this regex is not matching http://example.com

Answer 1

Use matcher.matches() instead of find(). Matches will match the entire region against the pattern.