Exception of internal blocks will be catch by main try-catch but i need to raise them

Question

When this code raise NotFoundException the exception of main block will be raised, but I would like to raise NotFoundException, how can I manage it?

try {
    if (x > y) {
        throw new NotFoundException("entity is not found");
    }
} catch (final Exception e) {
    throw new InternalServerErrorException(e);
}

Answer 1

try {
    if (x>y)
        throw new NotFoundException("entity is not found");
} catch (Exception e) {
    if (e instanceof NotFoundException) {
        throw e;
    } else {
        throw new InternalServerErrorException(e);
    }
}

or...

try {
    if (x>y)
        throw new NotFoundException("entity is not found");
} catch (NotFoundException e) {
    throw e;
} catch (Exception e) {
    throw new InternalServerErrorException(e);
}