Pattern matching with Java regex

Question

My server dev gave me a regex that he says is the requirement for user name. It is @"^\w+([\s-]\w+)*$"

I need help figuring out right Java expression for this. It is confusing since I need to put some escape characters to make compiler happy.

I am trying this. Please let me know if this is right :

Pattern p = Pattern.compile("^\\w+([\\s-]\\w+)*\\$", Pattern.CASE_INSENSITIVE);

   Matcher m = p.matcher(username);

   if ((username.length() < 3 ) || (m.find())) {
      log ("Invalid pattern"); 
      return false;
   }

Is this correct ?

Answer 1

The correct pattern is "^\\w+([\\s-]\\w+)*$".

$ denotes the end of the string, if you use \\$ it will force the string to have the char $ and that's not the intent.