Java – What is equivalent to .replaceSecond or .replaceThird?

In this code, we use the .replaceFirst method to remove the substring “luna” from the email string. We are removing the character between + and @. But this only happens in the first instance because we used .replaceFirst. What if we want to remove “smith” against the second instance of + and @?
Our output now is alice+@john+smith@steve+oliver@ but we want alice+luna@john+@steve+oliver@

public class Main {

public static void main(String[] args) {

String email = "alice+luna@john+smith@steve+oliver@";

String newEmail = email.replaceFirst("\\+.*?@", "");

System.out.println(newEmail);

}
}

You can find the second +:: like this

int firstPlus = email.indexOf('+');
int secondPlus = email.indexOf('+', firstPlus + 1);

(If necessary, you’ll need to handle cases where there are no two + lookups).

Then find @:

int at = email.indexOf('@', secondPlus);

Then stitch it up :

String newEmail = email.substring(0, secondPlus + 1) + email.substring(at);

or

String newEmail2 = new StringBuilder(email).delete(secondPlus + 1, at).toString();

Ideone demo