Entitymanager

Entitymanager save entity
How do you save an object in EntityManager?What is JPA merge?What does EntityManager merge do?What happens if EntityManager is not closed?Does Entity...
How to create entitymanagerfactory
To create the EntityManagerFactory you need to create to persistence. xml file first. The file is where you configure the JPA. This file must be place...
Entitymanager persist
What is EntityManager persist?What does EntityManager persist return?Do we need to close EntityManager?What is persistence context?What is the use of...
Entitymanager update entity
We use the EntityManager. merge() method to update an entity. This method takes the entity to be saved as the parameter and return the merged entity b...