JAVA-default no argument constructor?
<p>Can any one explain to me the basic need of default no argument constructor in many Java related APIs. Like as a general rule all java bean classes or entity classes (JPA etc) or JAX-WS implementation classes require a explicit no argument constructor.</p>

<p>If by default Java provides a no argument constructor then why most of these standards require a explicit constructor?</p>

<p>Thanks in advance.
Rakesh</p>
