Chapter 9.1, Problem 3STQ

Exception:

• • It is nothing but an undesirable or unexpected event that occurs at run time which interrupts the normal flow of the program’s commands.
• • Exception handling is a mechanism that handle runtime errors like “ClassNotFoundException”, “SQLException”, and so on.
• • An advantage of exception handling is to maintain a flow of the program.
• • An exception can be handled using “try” and “catch” block.

Types of exceptions:

There are two types of exceptions. They are:

• • Checked Exception:
  • ○ A class that inherits a “Throwable” class except “RunTimeException” and “Error” are called as checked exceptions.
  • ○ Example:“IOException”
• • Unchecked Exception:
  • ○ A class that inherits a “RunTimeException” class is called as unchecked exceptions.
  • ○ Example:“ArrayIndexOutOfBoundException”

Exception is an object: The exception is considered as an object because, the exception creates an object that contains a message...