Why does JAXB need a no arg constructor for marshalling?

Question

If you try to marshal a class which references a complex type that does not have a no-arg constructor, such as:

import java.sql.Date;

@XmlRootElement(name =         


        

Answer 1

Some enterprise and Dependency Injection frameworks use reflection Class.newInstance() to create a new instance of your classes. This method requires a public no-arg constructor to be able to instantiate the object.