Although it is part of the java.util.concurrent package, the TimeUnit enum is useful in many contexts outside of concurrency. In this post, I look at how the TimeUnit enum can be used even in code ...

In fact, when one is specified, it is ignored anyway. The example above intentionally used the hard-coded 42L used in Joshua Bloch’s Effective Java example of how not to create a serialVersionUID.

JPA and Hibernate enum mapping The Java enum, introduced in Java 5, will map to the underlying database without any intervention. The JPA framework, be it Hibernate or Toplink or DataNucleus, will ...