Javabean vs. class instantiation

[mazdotnet]

Hi all,

I'm very new to Java and JSP (ASP.NET and PHP background) and I was
wondering which of the following 2 ways are the preferred way using
objects.

After you write a class,

1. To instantiate it and use object x = new object()

or

2. Use it as a bean? <jsp:useBean>

Thanks
Maz

 

[Arne Vajhøj]

I'm very new to Java and JSP (ASP.NET and PHP background) and I was
wondering which of the following 2 ways are the preferred way using
objects.

After you write a class,

1. To instantiate it and use object x = new object()

or

2. Use it as a bean? <jsp:useBean>

Only the first is possible in a .java file.

The second is usually recommended in a .jsp file.

Arne

 

[Lew]

Suggestion:

Only the first is possible in a .java file.

The second is usually recommended in a .jsp file.

In addition to the <jsp:useBean> tag, there are Expression Language (EL)
constructs you can use in a Web application.
<http://java.sun.com/javaee/5/docs/tutorial/doc/bnadp.html>

Whether a class is a bean depends on how the class is written, not on how it's
used. The minimum requirement for a class to be a bean is to have accessor
and mutator methods (getX() and setX()) corresponding to its attributes.
There are additional capabilities possible.
<http://java.sun.com/javase/6/docs/technotes/guides/beans/index.html>