Question

I’m trying the following segment to no avail:

 public class test {

    public static void main(String args[] ){

       String password = "s8bgBQYPmUaNjkToXCJLAwAA";
       System.out.println( Pattern.matches("[0-9]", password ));

   }

}

I would expect that to work since I’m just looking for match of any digit to suffice the regex but my output always comes back false. Any help as to what I maybe missing or what could be wrong would be most appreciated.

Answer 1

You’re checking whether the whole string consists of one single digit. What you really mean is:

System.out.println( Pattern.matches(".*[0-9].*", password ));

Adding the .* to the start and end lets it match any number of other characters (. means “any character” and * means “any number of times”).