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J2EE Enterprise JavaBeans technology lets you write server-side components (Enterprise beans) that encapsulate an application's business logic.

• Entity Beans
• Message Beans
• Session Beans

Entity Beans

• Banking Application code samples from the Java Series book The J2EE Tutorial: Enterprise JavaBeans Technology. There is entity bean code in the /examples/src/ejb/savingsaccount/SavingsAccountEJB,
  /examples/src/ejb/storagebin/StorageBinBean class and in the classes found in the /examples/src/ejb/cmproster/ directory.
  
  
• Optimizing Entity Beans Java ARchive file. To download the JAR file, right-click on the link and choose 'Save Link As'. For supporting information, see Seven Rules for Optimizing Entity Beans

Message Beans

• Banking Applications code samples from the Java Series book The J2EE Tutorial: A Message-Driven Bean Example. There is message bean code in the /examples/src/ejb/simplemessage/SimpleMessageClient and /examples/src/ejb/simplemessage/SimpleMessageEJB classes.

Session Beans

• AcctManageEJB.java is a simple session bean that uses a resource adapter. It hase Home and Remote interface. For more information and instructions on how to convert this to use the Common Connector Interface, see Using the J2EE Connector Architecture Common Client Interface.
  
  
• Banking Application code samples from the Java Series book The J2EE Tutorial: Enterprise JavaBeans Technology. There is session bean code in the /examples/src/ejb/cart/CartEJB class.