Although it is part of the java.util.concurrent package, the TimeUnit enum is useful in many contexts outside of concurrency .

An example of an SDK classes that make use of this feature is the TimeUnit enum (see my blog post on this). Another example is Guava’s CaseFormat enum (via its to (CaseFormat,String) method).

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 ...