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Java Hibernate Basics Persisting Data with Hibernate Saving an Entity with Hibernate

For each TODO comment in the save method, add the one line of code that accomplishes the task.

Here is my code i can not understand what is it wrong

HibernateMachine.java
import org.hibernate.Session;
import org.hibernate.SessionFactory;

public class HibernateMachine {
  // Assume sessionFactory has been initialized properly by its default constructor
  private static final SessionFactory sessionFactory = new SessionFactory();

  public void save(Language language) {
        // TODO: Open a session
    Session session = sessionFactory.openSession();
    // TODO: Begin a transaction
    session.beginTransaction();
    // TODO: Use the session to save the language
    session.save(language);
    // TODO: Commit the transaction
        session.getTransaction().commit();
    // TODO: Close the session
    session.close();

  } 
}
Brendan Whiting
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Brendan Whiting
Front End Web Development Techdegree Graduate 84,734 Points

Hmm. It says "There is a compiler error. Please click on preview to view your syntax errors!" But there's no "Preview" button as there is on other challenges.