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Q) Explain about “finally”?




A)
->”finally” keyword is used to create a block of statements.
->nature of finally block is that it gets executed in both exception raised case and non-raised case. Unlike try and catch blocks.
->unlike means catch is not executed exception non-raised cases, try is not executed completely in exception raised case.
->resources releasing code is written in finally block.

Ex:
 file closing, connection closing (JDBC connection closing)..etc.

->”finally” block is used in java application to release the resources allocated to the application.


Ex:

class withhandling
{
       ---
       ---
       try
       {
              System.exit(0);
       }
       catch(--)
       {
             
       }
       finally()
       {
              --
       }
}

->Here with System.exit(0); method the finally block is not executed.
->The finally block ensuring the release the resources. But not handling the exceptions.
 ->So far guaranty execution sake only the finally block is defined.

-> System.exit(0); with this method explicitly terminate the applications normally, whenever this method is executed before finally block then that finally block doesn’t executed.

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