A few review questions covering variables, expressions, and assignments are available as a PDF file.

Capabilities for the classes from the in-class exercise are given below. The goal is to get three boxes on the chalkboard: an empty one and one with a six-pointed star on the left and one with one row of 3 lines and another row of 2 on the right.

I suggest you start by making a professor and asking him to explain what to do (but you must speak in Java).

Professor

• Professor() creates a new professor
• explain() makes this professor explain what you're doing
• pickUp(Chalk c) makes this professor pick up the given piece of chalk, putting down any he is currently holding
• drawStar(Box b) makes this professor draw a five-pointed star in the given box with the piece of chalk he's currently holding; if he has no chalk then nothing happens
• drawStar(Box b, int points) like the previous method, but allows you to specify the kind of star to draw
• drawLine(Box b, int howMany) makes this professor draw the given number of lines in the given box, starting below where he last drew lines in that box (if any); nothing happens if he has no chalk
• erase(Box b, Eraser e) makes this professor erase the contents of this given box with the given eraser

Chalk

• Chalk() creates a new piece of chalk

Eraser

• Eraser() creates a new eraser

Box

• Box(int board) creates a new box on the given chalkboard