Spring Semester 2005

Create a folder on your desktop and copy the following files in it:

• ActionList.java
• AppletFrame.java
• NoFlickerApplet.java
• Penguin.java
• Rink.java

Now add two more files to the folder:

• One.java
• Dance.java

Finally copy this last program in your folder, and you're ready to start:

• SliderTest.java

Once you have all these files in the folder you're ready to proceed.

1. The first thing we want you to do is to compile SliderTest and run it.

2. Then we want you to compile One.java and run it.

3. Then compile Dance.java and run it.

If things run smoothly your last two programs will look something like this:

So here's your lab assignment for next time.

A201/A597 LAB ASSIGNMENT ONE

A. First write a program as described below.

In your program:

1. Create a square room composed of 100 tiles (10 x 10, that is).
2. Create a Penguin, and add it to the room in the 8^th line and 3^rd column.
3. That means tile (7, 2) given our the numbering convention.
4. So, please take some time to review the numbering convention now.
5. Now ask the penguin to turn around and move to tile (2, 2).
6. Then ask the penguin to turn right, then move to tile (2, 7).
7. Then make the penguin turn right, and have it move to tile (7, 7).
8. Now ask the penguin to move to tile (2, 7).
9. And finally have it return to (7, 2), passing through (2, 2).

In writing this program the following summary should help:

A Penguin:

• can be created (and it will be facing south by default)
• can be added to a Rink at a certain location (you have to ask the rink for that, though)
• can be asked to turn left, or right (regardless of the direction it's facing)
• can be asked to move one cell forward (regardless of the direction it's facing)

• can be created (with the size (columns, rows) of your choice)
• can hold one penguin at a time, added with add
• adding a penguin to a rink is done by specifying
  1. the column (vertical slices), and the
  2. line (lines are horizontal rows in the rink)

  in that order, in the method add.

Note that x and y still keep the meaning that they originally had:

• x is the number of columns to the left, and
• y is the number of lines above (to the top)

When we create the Rink, and when we add a Penguin to it, we mention x first, and y next, almost as we do in analytical geometry. However when we refer to the table of cells that the Rink is, we can also denote the cells in the array by printing (y, x), that is, by specifying the line first, and the column next. The point being that both notations are well-established, and we need to be aware of them both.

You should now write the program with no problems.

And here's a picture of Wallace and Gromit from The Wrong Trousers to remind you of it, and for motivation.

The Aardman Penguin is pictured in disguise at the beginning of the assignment.

B. The second part of the assignment asks you to write a program that prints the following strange picture exactly as shown:

         /--\
         |\n|
      /--+--+
      '  "  "
   /--+--+--+
   '  "  "  "
/--+--+--+--+
|\n|\n|\n|\n|
\--+--+--+--/

You need to show these programs to the AI next week, in lab.

You also need to be able to take questions on the programs.

You also need to be able to take questions on the topics covered in class during the first week.

Please practice the programs and concepts shown in class Tue and Thu.

They have been posted as Lecture Notes One and Two.