Checked and Unchecked Exceptions

• Compiler tracks only checked exceptions.


• Checked exceptions are in general thrown for reasons beyond the
  programmer's control. Input, output operations may fail and
  throw exceptions (e.g. IOException, FileNotFoundException, ...)

• Unchecked exceptions are, generally, the programmer's fault,
  as the corresponding condition should not occur at all.
  
• NullPointerException and IndexOutOfBoundsException are not checked.
• Two approaches for dealing with checked exceptions
  
  • Declare the exception in the method header, indicating method may throw this type of exception
  • Catch the exception