The J2EE™ Tutorial Second Edition

Writing Backing Bean Methods

Methods of a backing bean perform application-specific functions for components on the page. These functions include performing validation on the component's value, handling action events, handling value-change events, and performing processing associated with navigation.

By using a backing bean to perform these functions, you eliminate the need to implement the Validator interface to handle the validation or the Listener interface to handle events. Also, by using a backing bean instead of a Validator implementation to perform validation, you eliminate the need to create a custom tag for the Validator implementation. Creating a Custom Validator (page 750) describes implementing a custom validator. Implementing an ...