Chapter 9.2, Problem 23STQ

Program Plan Intro

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.
• Try and catch block: Java virtual machine (JVM) searches to handle the error in “catch” clause at that time of exception in the program. So “try-catch” statements are used in order to handle those exceptions. The following are the main keywords used in exception handling.
  • “try” block: Try block contains the block of statements to monitor the exception and it thrown the exception.
  • “catch” block: Catch block catch exception thrown by the try block to handle it.