JBK? You don't need anything special to write  or compile  a bean  (well,
you need the javac compiler which comes with the java  SDK). A bean is
just a Java class which conforms to a set of rules:

- Must have a default constructor
- Must have get and set methods for each read/write property
- Must use the JDK defined event structure for event handling

There may be other rules as well, such as requiring Serialization, but I
can't recall them at the moment. You may want to read the JavaBeans
specification ( java.sun.com/products/javabeans/docs/spec.html )
for full details.

There's a difference between the normal Java beans and JSP beans, but I
don't really know JSP beans.

No, I don't believe there is. What makes you think that there is a
difference?

Not a big difference, but

"The standard way of handling forms in JSP is to define a "bean". This is
not a full Java bean. You just need to define a class that has a field
corresponding to each field in the form. The class fields must have
"setters" that match the names of the form fields."
(http://www.jsptut.com/Forms.jsp)

if you continue reading on you'll notice that you also should
define getters, otherwise how can you get the data out of that bean.
Also, if you are using the useBean tag you must have a default
constructor. IMO this would make beans used in JSP the same as normal
JavaBeans.