To update the usage of JPA in a Java project, you’ll need to update your pom.xml file (if you’re using Maven) or build.gradle file (if you’re using Gradle). You would also need to update any relevant application configurations, such as database settings or persistence units.

The code to update a database using JPA often uses the EntityManager’s merge() method, which can be used to update an existing database entry. For example:

In the above code, the Person object would first need to be retrieved from the database, its properties updated, and then passed to the updatePerson() method to be persisted to the database. The merge() method returns the updated object.

However, to provide more accurate information, it would be helpful if you could specify what exactly you want to know: Are you interested in new features in recent versions of JPA, or are you looking for a way to update (modify) entities using JPA?