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If JPA is specification, how can we use it?

 
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Can you anyone suggest how can we use JPA in Project, as it is just specification not implementation like Hibernate or Toplink?
 
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You can use JPA the same way you can use JSP, Servlets or EJB.
The specification defines the interface/contract and the developers implement those specifications. Tomcat implements JSP and Servlets specifications. Hibernate and TopLink implement the JPA specification.
 
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