April 05
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
Best
Practices for Designing API (cont.)
3.Try not to create new custom exceptions if
they do not have
useful information for client code.
public class DuplicateUsernameException
extends Exception{}
nThe new version provides two useful
methods: requestedUsername(),
which returns the requested name, and availableNames(), which returns an array
of available usernames
similar to the one requested.
public class DuplicateUsernameException
extends Exception {
public DuplicateUsernameException (String username){....}
public String requestedUsername(){...}
public String[] availableNames(){...}
}