createEntityManagerFactory(persistenceUnitName, properties) - JPA Persistence's static method

Static Method
EntityManagerFactory createEntityManagerFactory(
  String persistenceUnitName,
  Map properties

Create and return an EntityManagerFactory for the named persistence unit using the given properties.
persistenceUnitName - the name of the persistence unit
properties - Additional properties to use when creating the factory. The values of these properties override any values that may have been configured elsewhere.
the factory that creates EntityManagers configured according to the specified persistence unit.
JPA 1.0

This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.