CSE116   Introduction to Computer Science II    Fall 2000
Lab 1



Labs are to be completed within the week in which it is allocated
and shown to the TA who teaches the lab to you.

Goals:

1. Exercise knowledge of  unix commands, editor (emacs or xemacs)
2. Evaluate  students' knowledge of the fundamental concepts of 
interface, class, systematic approach to class definition
and testing the methods.
3. toString and equal utility methods.
4. Command line arguments.

1. Create a new directory tree cse116/lab/lab1 in your home directory.

2. Copy ~bina/cse116/fall2000/lab/lab1/Rectangle.java into your lab1 directory.

3. Rectangle.java represents the example given during lecture
class Study th program. 

4. There is an interface, implementation of the interface in a class,
and client (driver) that tests the implemented class.

5. To exercise your unix and editor skills, first compile the
Rectangle.java
using javac command. Then execute the application RectangleClient
 javac  Rectangle.java
 java RectangleClient 

Observe operation.

6. Next split the interface, class and testing client into three
   different files.

7. Remove all class files: rm *.class

8. Compile and execute the RectangleClient.

9. Study the toString method of the implementation.

10. Add another utility method equal that returns true if a rectangle
   passed as a parameter has the same area! In another implementation
equality may be strict in that it may require length and width
   measures to be the same. (Do you realize the significance of
   interface and / implementation separation?)

11. Add statements in your RectangleClient to test the equal method.

12. Current version of client has the size of the rectangle hardcoded.
Change to accept values for width and length from the command
   line. Your TA will help you with this part.



Show your completed lab to your TA.
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