Java Beans

A bean is reusable software software component.

It is a type of object that obeys the following rules.

• It must have a zero argument public constructor argument e.g. public MyBean() { …
• It implements the Serializable interface
• Its fields are accessed via get and set methods
• Implements listener mechanisms

JavaBeans used to be used only for client side GUI Development where they could be dragged from a beanbox into a view. They are now used on the server side as Enterprise Java Beans.

The usebean attribute concern non-visual beans

The main advantage of a bean is introspectoin

Enterprise Java Beans are Entity Beans

Entity beans model business 'Nouns'

http://www.unix.org.ua/orelly/java-ent/ebeans/ch06_01.htm