Why runtime exception is unchecked exception?

Question

Generally if any class extends Exception , it becomes checked exception. Runtime exception also extends Exception. Then how is it unchecked e

Answer 1

Here is a useful link: http://www.javapractices.com/topic/TopicAction.do?Id=129

It explains the difference between unchecked and checked and gives some examples.

"It is somewhat confusing, but note as well that RuntimeException (unchecked) is itself a subclass of Exception (checked)."