Polymorphism : it means that an entity can be used under many forms. For example, if we have a method called method(), the polymorphism allows to use it with another implementation like : method(p1) or , method(p1, p2) or any other form using the same name method. This can be helpful for an developer, because he shouldn’t …
Monthly Archive: May 2011
May
24
What’s JEE and which are their APIs?
JEE : Java Enterprise Edition (ex J2EE) is a specification of Java Sun technique for enterprise applications. These apllications are designed in a multi-levels approach. To do this, each implementation of this specification contains a set of Java Standard framework extensions to make easy the creation of distributed applications. Servlet : Component reprensting the C of MVC paradigm Portlet : Web container (extension …
May
23
What is Hibernate?
Hibernate is a an object/relational mapping framework, it allows to manipulate data from a relational database as objects. As a framework, it uses many files of mapping and settings. See also :
May
23
Which are the struts tagLibs?
They are four : Bean : they are useful to define new beans in any scope and from many resources, as well as a tag to render a particular bean or property to the output response. HTML : they are used to create HTML form, and to create a HTML code based user interfaces. Logic …
May
23
What’s difference between directive and action?
Directive : it affects the jsp page where it is placed and only this page. Therefore, it affects the entire structure of the resulting servlet. Action : it affects the behavior during the execution of the page. See also :
