如何从 matcher.group() 获取字符串并将其存储在 java 中的单独字符串变量中？

Question

String emailAdress = "[e-mail]";Pattern emailAddress = Pattern.compile("(.*)(@)(.*)");Matcher matchEmailAddress = emailAddress.matcher(emailAdress);String secondPartOfEmail;while(matchEmailAddress.find()){    System.out.println(matchEmailAddress.group(1));    System.out.println(matchEmailAddress.group(3));}当我运行这个源代码时，输出是：你的名字yourdomin.com我想将yourdomain.com存储在字符串类型变量中以备后用。我的意思是 matchEmailAddress 匹配器中的 group(3)。我已经尝试过：String secondPartOfEmail = matchEmailAddress.group(3)但是发生了错误。

Answer 1

假设您只想匹配一个电子邮件地址，您可以这样做：

String emailAdress = "[e-mail]";

Pattern emailAddress = Pattern.compile("(.*)(@)(.*)");

Matcher matchEmailAddress = emailAddress.matcher(emailAdress);

matchEmailAddress.find(); //find the next substring matching your pattern

String secondPartOfEmail = matchEmailAddress.group(3);