space is too much

/**
 * Return the concatenation of first name and last name separated by a space.
 */
public String getFullname() {
 String s = "";

 if (this.getFirstName() != null) {
  s += this.getFirstName() + " ";
 }

 if (this.getLastName() != null) {
  s += this.getLastName();
 }

 return s;
}

Let's say that firstName = 'Pitt' and lastName = 'Dirk'. We got "Pitt Dirk". And what if the firstName is null, we got " Dirk". Hum, less good.

And what if both are null, we got " ", a space!


This f**king space mess up our database. The better, this kind of method are copied/pasted every where the same behavior was needed.


What do we need then ? A nice join method that concatenate elements of an Object array inserting a separator between elements and ignoring null and/or empty string.