I've added some Notes on the Wator Assignment.

After spending most of the evening helping students, I now have a better idea of where some of the worst problems are coming from (mostly with not getting the display to update properly). I will post some (hopefully helpful) advice shortly, so if you are having a lot of trouble, especially with the display, watch this page for further information.

As I don't have the next assignment ready, you can have an extra day on the Regular Expression assignment. New due date is Thursday, November 21, before midnight.

The next assignment will be posted soon, and will be due December 4. This will be a full week plus a bit, not counting the Thankgiving holiday days.

This Regular Expression Test Applet should help you understand regular expressions.

For the eighth assignment, I have posted an example dictionary and text to be translated. If time permits, I will post additional examples.

• Here are the Answers to the Midterm.
• Here are the Approximate Preliminary Grades, based on the midterm and the first four assignments, so that you have a somewhat better idea of where you stand in the class. I will update this page as frequently as I can manage.

This Regular Expression Test Applet should help you with understanding regular expressions.

Here is some sample data for your seventh assignment: a dictionary and some text to be translated. I may provide additional examples later, if time permits.

Correction: In player.use(), change the line
      return ((Key)thing).use(this, location);
to:
     return thing.use(this, location);

Also, I apparently haven't emphasized this enough: You can make any changes you like in my program. You are not restricted to changing certain classes or methods. So long as your program is recognizably derived from mine, that's fine.

There is an error in the algorithm I gave you for the second assignment (you end up with the inverse of the fraction you want). If you have already printed out the assignment, replace the lines:

      numerator = 1;
      temp = 0;
 
      denominator = numerator;
      numerator = (numerator * last-unused-denominator) + temp;
      temp = denominator;

      numerator = 1;
      denominator = 0;
 
      temp = numerator;
      numerator = denominator;
      denominator = (numerator * last-unused-denominator) + temp;

Start-of-semester woes:

• If you are running BlueJ 1.2.x and Java 1.4.x on your own computer, you should be able to step through the tutorial without any problems.
• If you are using the Windows computers in Towne, they have an older version of BlueJ; that will be OK for the first few assignments, but there may be more differences from the manual.
• If you are using the Linux computers in Moore 207, the files are read-only, and you can't do many of the tutorial steps. Open a terminal window, make sure you don't already have a directory named examples, and type this command:   cp -r /usr/local/bluej/examples . (the period at the end is part of the command). Now use BlueJ on the files in this new directory.

I will have a lab tomorrow (Tuesday, Sept. 10), 11:00-12:00 in Moore 207. However, as there is not yet an assignment, I don't really expect anyone to show up; I'll be testing the installed software and making sure everything is ready. If you want to take a preliminary look at Linux, feel free to come on by.