JPA Tutorial What is Object persistence? Today most of the development is carried out in an object oriented manner using languages like java,C++ etc. When thinking in terms of Java as the programming language,the business logic of an application works with Objects of different class types. However when dealing with the data store,it's important to note that the tables of a database are not objects,which becomes an issue. This is where the concept of Object Persistence comes in. Object Persistence deals with persistence in object oriented program such as java.It means determining how objects and their relationships are persisted in a relational database. What is ORM? Object Oriented Programming use Classes whereas Relational Database use tables. In programming this will creates a gap. This gap is called impedance mismatch. We can bridge the gap between Object oriented model and Relational model is known a