Sams Teach Yourself EJB in 21 Days

Exercises

To extend your knowledge of the subjects covered today, try the following exercises.

1:	Design a student bean-managed persistence bean. The bean consists of the persistent fields studentId, firstName, lastName, and address. Draw a class diagram that shows the entity bean class and its interfaces along with their methods. In addition, provide a method that calculates the total number of students.
2:	Design an order container-managed persistence bean. The bean consists of persistent fields orderId, studentId, orderDate, and amount. Draw a class diagram that shows the entity bean class and its interfaces along with their methods. In addition, provide a method that calculates the total amount for all orders.