Behavior when a Subclass doesn't invoke superclass constructor
<p>According to my text book:</p>

<blockquote>
  <p>If the execution of any constructor in a subclass does not invoke a
  superclass constructor, Java automatically invokes the no-parameter
  constructor for the superclass.</p>
</blockquote>

<p>Does that mean all the superclass data field(superclass variables) would be set to null(because the constructor is a no-parameter constructor)?</p>
