Clash Royale CLAN TAG

How to give range in lookhead using regex e.g ^(?=(.*[a-z]){1,3})(?=.*[0-9]).{2,5}$

Question-
1]String length is 2 to 5
2]String contains at least 1 char and maximum 3 char
3]Atleast one number


I want do using lookhead.
What i tried but not working
^(?=(.[a-z]){1,3})(?=.[0-9]).{2,5}$

1 Answer
1

Try using below regex

^(?=([A-Za-z0-9]{1,3}$))(?=(.*[0-9].*)).*

^(?=([A-Za-z0-9]{1,3}$))(?=(.*[0-9].*)).*

I have two look-ahead

1) Ensure that it should have 3 characters

2) It should at least have 1 number

Sample Code

public static void main(String args) {
String regex = "^(?=([A-Za-z0-9]{1,3}$))(?=(.*[0-9].*)).*";

Pattern pattern = Pattern.compile(regex);
System.out.println(pattern.matcher("AB2").find());
}


By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.