Thread: Name Logic for Program

I have user enter in a first name. how do I make sure that the first name is at least 2 characters long and only alphanumeric?

In case anyone is wondering how I accomplished it (this is using methods/objects) it turns out that I needed to just default names to First and Last not re-submit data.

public void setfirstName(String first){
    if (first == "" || first.length() < 2)
            this.firstName = "First";
        else
            this.firstName = toProperCase(first);
}

public void setlastName(String last){
 if (last == "" || last.length() < 2)
            this.lastName = "Last";
        else
            this.lastName = toProperCase(last);
}

public static String toProperCase(String data){
      String firstLetter = data.substring(0,1).toUpperCase();
      String restLetters = data.substring(1).toLowerCase();
      return firstLetter + restLetters;
    }