I've used Java Architecture for XML Binding (JAXB) successfully for a wide set of problems and generally really like it . However, it is not without its downsides.

I introduced the issue of JAXB-generated classes not having explicitly overridden equals (Object), hashCode (), or toString () methods in the blog post Adding Common Methods to JAXB-Generated Java ...

The HashMap tutorial also includes some useful code snippets that help developers understand what's going on with a Java HashMap under the covers. For example, the following code used in the tutorial ...