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JJ Introduction

Welcome to JJ. This page briefly introduces you to the JJ programming language environment; each button is introduced.

On your left, you see an area that you can use to type in your JJ code. On your right, you see an area that will show you either:

  1. the approximate location of a CheckIt error, or
  2. the Java(tm) code that matches your JJ code
In between the left and right text areas you see a CheckIt button. Click this button whenever you want to check your JJ code. If the right area shows that you have a CheckIt error, be sure to look at the bottom area for the error message.

Between the bottom error area and the top text area you see a line of buttons:

  • Beginner (tutorial for the JJ beginner)
  • Reference (lists of JJ commands, words, diagrams, etc.)
  • Examples (a few JJ examples)
  • JJ White Papers (papers on JJ for both students and teachers)
  • prev (back to your previous CheckIt attempt)
  • next (forward in your CheckIt attempts if you press 'prev')
  • clean (erase both the left and right areas)
  • submit (submit your JJ code for grading)
  • CheckItOut! (runs JJ code if no CheckIt errors)
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