Exception in JavaBeans

[bbq]

I'm using the javabeans with a jsp page, but when I run it this message appears:


javax.servlet.ServletException: class generation1.Sells :
java.lang.InstantiationException: generation1.Sells

these are my classes

public class Sells
public class Sellsdetails extends Element

I'm implementing a generator of xml files


please help me

[Heather]

Read this article

InstantiationException (Java 2 Platform SE v1.4.2)

especially this part:
"Thrown when an application tries to create an instance of a class
using the newInstance method in class Class, but the specified class
object cannot be instantiated because it is an interface or is an
abstract class."

[Jack]

I read this article and bbq this is important

"Thrown when an application tries to create an instance of a class
using the newInstance method in class Class, but the specified class
object cannot be instantiated because it is an interface or is an
abstract class."