Checked vs. Unchecked exceptions

All predefined exceptions in Java are either a checked exception or an unchecked exception.

Checked exceptions must be caught using try / catch block or we should throw the exception using throws clause.

If you don't, compilation of program will fail.

Object

     |---- Throwable

                   |---- Error       |----- Exception (checked)

                                                             |----- RuntimeException (unchecked)