JAVA Regex for password validation issue

Question

i have a regexp for password validation ( Regexp Java for password validation with extra special characters)

String pattern ="^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=!\\*_?|~(){}/<>:\"\',\\[\\]`;\\\\\\\\-])(?=\\S+$).{8,}$";

The issue with this is, if i say

 "Xyz.123".matches(pattern);

This returns false

However, if i say

  "Xyz.123$".matches(pattern);

This returns true

'.' is not a valid special characters in my case. But if my password has a valid special character along with '.' it returns true

Answer 1

You have \\\\S+ , which means "any non-space character." . satisfies that. You also need the $ to satisfy the third pseudo-condition (lookahead). . is not in that, but $ is.

EDIT: If you do not want any periods at all, change the last pseudo-condition to (?=[^\\\\s.]+$)