title: Why can overriding methods throw any unchecked exception?
body: <p>why overriding methods can throw unchecked exception in java ?</p>
  
  <p><strong><em>Why can't overriding methods throw exceptions broader than the overridden method?  Is not my question .</em></strong> 
  I just want to know why Overriding methods CAN throw unchecked exception while cannot throw checked exception. </p>