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.

Besides its usefulness in providing highly readable time unit conversions and besides its usefulness in demonstrating the significant advantages of the Java enum, TimeUnit provides an example of ...

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 ...