Regex (regular expression) password check with Java
Our String is
aaaaaZZaa44
and with the regular
((?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{6,})
we check if our password contains at least one digit, one upper and lower case.
we also check the length of the password, if its greater than 6.
import java.util.regex.*;
public class RegexPwdCheck {
public static void main(String[] args) {
String passwd = "aaaaaZZaa44";
String pattern = "((?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{6,})";
System.out.println(passwd.matches(pattern));
}
}
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