J2EE™ Tutorial, The

The SavingsAccountEJB Example

The entity bean illustrated in this section represents a simple bank account. The state of SavingsAccountEJB is stored in the savingsaccount table of a relational database. The savingsaccount table is created by the following SQL statement:

CREATE TABLE savingsaccount 
   (id VARCHAR(3) 
   CONSTRAINT pk_savingsaccount PRIMARY KEY, 
   firstname VARCHAR(24), 
   lastname  VARCHAR(24), 
   balance   NUMERIC(10,2)); 

The SavingsAccountEJB example requires the following code:

• Entity bean class (SavingsAccountBean)

• Home interface (SavingsAccountHome)

• Remote interface (SavingsAccount)

This example also makes use of the following classes:

• A utility class named InsufficientBalanceException

• A client class called SavingsAccountClient

The source ...