Username or EmailPassword
> I was under the impression the javax package was
> more for things that are considered experimental
> and/or subject to potentially compatibility-breaking
> API changes in the future. Correct me if I'm wrong.
javax was originally for extensions to Java that were not part of the core API. However, many of the things that were originally not part of the core API have since been integrated so that they are part of the core API and are included with the standard JRE. However, since moving them from the javax to the java package would have broken too much existing code, they just stayed in the javax package.