Java Exception Handling for Scanner input: Clearing bad data with nextLine (catch vs Finally)

Question

When you call input.nextLine() as part of your exception catching is it better to place it into every catch block or just inside a finally block at the end of the try-catch. What is the advantage or disadvantage to either approach?

example:

catch (InputMismatchException e)
    {
        input.nextLine();
        System.out.println("Cannot add to Database, please enter only integers");
    }

    catch (Exception e)
    {
        input.nextLine();
        System.out.println("Impossible to add, please enter only letters from a-z");
    }

Or

catch (InputMismatchException e)
    {

        System.out.println("Cannot add to Database, please enter only integers");
    }

    catch (Exception e)
    {

        System.out.println("Impossible to add, please enter only letters from a-z");
    }

    finally
    {
        input.nextLine();
    }

What is the advantage or disadvantage to either approach?

Regards,

Pill.

Answer 1

If you want to read next line irrespective of exception conditions(exception raised or not raised whether it is handled or not handled) write input.nextLine() in finally block. If you want to read next line only when an exceptions raised and it is handled then write input.nextLine() in respective catch block.

Answer 2

catch and finally are different usage. finally don't care about exception types, etc. So, use finally when you need to execute code whether the method process ok or not.

catch care about exception types. So, you handle when exceptoin occured. Because you don't want your application crash.