By Chuck Easttom
JBuilderTM 7.0 EJB Programming courses the skilled Java programmer during the complex Java ideas on hand in JBuilder 7.0, the ultimate Java programming instrument. The e-book specializes in the improvement of JavaBeans and company JavaBeans (EJB) and the way to improve them extra successfully utilizing JBuilder 7.0. starting with an advent to beans, the writer discusses patience, distant calls, stateless and stateful consultation beans, and integrating Java and database programming. there's particular emphasis on complex good points, together with exception dealing with, defense, and using CORBA in allotted Java purposes. each one bankruptcy comprises keyword phrases and overview questions. The appendixes contain assets, a word list, and an HTML primer.
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Of course, not all instance variables are mapped to properties. A bean’s properties are defined by the method names themselves, not the variables or implementation behind them. This leaves the bean designer free to alter the inner workings of the bean without altering the interface and collection of properties exposed to users of the bean. However, I usually recommend that you use property names that are close to the names of the instance variables they map too. This makes reading your code much easier and will improve the maintainability of your JavaBean code.
Then you import any packages you will need to use in your code. Finally, you define your various classes. It is not required that the first class defined be the main class of the source file. However, it is quite common to see code written this way, and I recommend this approach for the sake of clarity. You will also see some code, occasionally, written without the package declaration line. However, if you do this, then your source file cannot be part of a package and therefore cannot be imported into another application.
But this class does have the necessary Chapter 2: Creating Your Own Beans 39 constructor so that it could be used as a bean. Unlike the previous example, this class’s constructor actually does something useful. You can see that each example I show you takes you, step by step, closer to the goal of creating your own JavaBean. Introspection and Reflection It is imperative that when your bean is running, the bean container can retrieve information about your bean’s properties, events, and methods.