<class name="com.mypackage.student.Student" table="STUDENT">
        <meta attribute="class-description">This class contains student details.</meta>
        <id name="studentId" type="long" column="STUDENT_ID">
            <generator class="native" />
        </id>
        <property name="studentName" type="string" not-null="true" length="100" column="STUDENT_NAME" />
        <many-to-one name="studentAddress" class="com.mypackage.student.Address" column="STUDENT_ADDRESS" not-null="true" cascade="all" unique="true" />
    </class>

public class Main {

   public static void main(String[] args) {
      Session session = HibernateUtil.getSessionFactory().openSession();
      Transaction transaction = null;
      try
      {
         transaction = session.beginTransaction();
         Address address1 = new Address("OMR Road", "Chennai", "TN", "600097");
         Address address2 = new Address("Ring Road", "Banglore", "Karnataka", "560000");
         Student student1 = new Student("Eswar2", address1);
         Student student2 = new Student("Joe2", address2);
         
         //Test Object
         Student student3 = new Student("Joe", address2);
         
         session.save(student1);
         session.save(student2);
         transaction.commit();  // If this line is commented and program is ran 2 times and then uncommented, the ID is still getting incremented
      } catch (HibernateException e)
      {
         transaction.rollback();
         e.printStackTrace();
      } finally
      {
         
         Integer count = ( (Integer) session.createQuery("select count(*) from Address").iterate().next() ).intValue();
         System.out.println(count);
         session.close();
      }
      
      //Integer count = (Integer) session.createCriteria("select count(*) from Address").uniqueResult();


   }

}