Chapter 5

Composing a Program

IN THIS CHAPTER

check Reading input from the keyboard

check Editing a program

check Shooting at trouble

Just yesterday, I was chatting with my servant, RoboJeeves. (RoboJeeves is an upscale model in the RJ-3000 line of personal robotic life-forms.) Here’s how the discussion went:

  • Me: RoboJeeves, tell me the velocity of an object after it’s been falling for three seconds in a vacuum.
  • RoboJeeves: All right, I will. “The velocity of an object after it’s been falling for three seconds in a vacuum.” There, I told it to you.
  • Me: RoboJeeves, don’t give me that smart-alecky answer. I want a number. I want the actual velocity.
  • RoboJeeves: Okay! “A number; the actual velocity.”
  • Me: RJ, these cheap jokes are beneath your dignity. Can you or can’t you tell me the answer to my question?
  • RoboJeeves: Yes.
  • Me: “Yes,” what?
  • RoboJeeves: Yes, I either can or can’t tell you the answer to your question.
  • Me: Well, which is it? Can you?
  • RoboJeeves: Yes, I can.
  • Me: Then do it. Tell me the answer.
  • RoboJeeves: The velocity is 153,984,792 miles per hour.
  • Me: (After pausing to think… .) RJ, I know you never make a mistake, but that number, 153,984,792, is much too high.
  • RoboJeeves: Too high? That’s ...

Get Beginning Programming with Java For Dummies, 5th Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.