CODEWITHSUNDEEP
java
user2662247
user2662247

Reputation: 59

Implementation of Finally Block

In the Code written below although i have not caught the ArithmeticException,yet the exception is handled automatically and with finally Block, the content of main() method is successfully Executed. Whereas if i remove the return statement from finally and make demo as returning void then the program after executing finally block throws MainThread Exception..why is it so?

public class FinallyDemo {

  int demo() {        
    try {
      int a=5/0;        
    }        
    finally {
       System.out.println("Finally Executed");
       return 10;   
    }
  }

  public static void main(String s[]) {
    int a=new FinallyDemo().demo();
    System.out.println("Exception Handled");
  }
}

Upvotes: 1

Views: 180

Answers (1)

Thorn G
Thorn G

Reputation: 12766

Because you return from the finally block, the exception is silently disposed. You should never return from a finally block! (Well, almost always never).

From the Java Language Specification:

If the finally block completes abruptly for reason S, then the try statement completes abruptly for reason S (and reason R is discarded).

This also means if you threw a different exception, like an IllegalStateException, from the finally block, the original exception would also be discarded.

Upvotes: 4

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