An old man was sitting in a park reading a book titled "Learn C in 21 days".

A passerby saw him and asked, "You are such an old guy, why do you bother to learn 'C'?"

"I have heard that now 'C' is the only language in heaven, and after my death, when I am in heaven, I don't want to face communication problems," the old man answered.

"But how can you be so sure that you will be in heaven? You very well could end up in hell," exclaimed the passerby. The old man replied, "Yeah well, it doesn't matter .... I already know Java".