JMemo is a simple application that helps you to memorize what you need for your studies. Add a word and its definition to the phone’s memory, and then scroll through the words trying to memorize their meanings. You can choose to view either the word first and then its explanation, or to view the explanation first and then present the word. JMemo can present the items in the order you enter them into the phone’s memory, or in random order. We have recently completed to develop our version for the Black Berry handsets models.
The Visitor Design Pattern
The visitor design pattern allows us to add operations to objects that already exist without modifying their classes and without extending them.