A JavaBean class (or,
simply, bean class) is a Java class with a parameter-free
constructor where all properties are serializable and have a
set method (also called "getter" and "setter"). A Java bean is an object created
with the help of a bean class.
A JPA entity class (or,
simply, entity class) is a JavaBean class with an
@Entity annotation, implying that a JavaEE runtime environment (such as provided by
the TomEE PLUS web server)
will take care of the persistent storage of its instances.