Computer Science 15-110, Lecture 9 (Sections M-Q), Fall 2009
Lab 1
Due:  Mon 31-Aug-2009 at 11:59pm (email copy to your CA)
(no late submissions accepted).

Read these instructions first!

• The homework collaboration policy does not apply to labs.  On homeworks, you must work alone.  On labs, however, while you may work alone, you are strongly encouraged to work in groups (collaboratively).  Groups would typically range from two to four members, but this is just a suggestion.  It is expected that everyone will work on lab in groups except for special circumstances which should be pre-arranged with the course instructor.
   
• That said, you may not simply copy your answers in whole or in part from others in the group.  You must put in bona fide effort on every assigned problem and be a real contributor to the group.  Then, yes, you may have the same or overtly similar answers as others in the group.  But this must be the result of working together, and not simply copying someone else's work.  Also, even with similar answers, everyone must submit their own solutions independently.
   
• Labs are graded, and the grade is included as part of the corresponding homework.  For example, lab1 will be graded as part of homework1.
   
• Lab time will generally be provided during recitation.  However, recitation lasts 50 minutes, and includes other details (homework Q&A, etc), and labs may require several hours, so you should expect to continue working on the labs outside of recitation.
   
• Regarding labs in recitation, the participation policy is in effect -- you are expected not only to attend recitations, but actually work in a group on the labs.  If you have completed the assigned work, then you should either help others, if they request it, or you should delve deeper into the assigned material.   But you must use the lab time exclusively to explore the material covered in that lab.
   
• In particular, you may not use lab time to do your homework (for this or any other class), as that defeats the collaborative nature of the lab.

Then read these additional instructions!

• Getting started:
  1. Download
     To start, copy this file to your hard drive:  Lab1.java
  2. Rename
     Rename the file to include your andrew id by appending it to "Lab1".  For example, my andrew id is "koz", so I would rename the file to Lab1koz.java (of course, you should use your andrew id in place of mine).
  3. Edit
     Next, run DrJava or JCreator and load the file you just renamed.
     Hint:  If you are on a Linux machine in 5419, don't forget this hint:  In DrJava's edit menu, open the preferences dialog.  Paste the following path into the "Tools.jar Location" field:
        /usr/lib/jvm/java-1.6.0-sun-1.6.0.15.x86_64/lib/tools.jar
     Apply the change, and close DrJava. When you re-open DrJava, it should successfully find the compiler and work correctly. Each user should only need to follow this procedure once ever.
  4. Sign
     Next, be sure to include your name, andrew id, and section in a comment on the first line of the file!
  5. Solve
     And finally, edit/compile/run that file until it passes all the tests (well, that's the goal, at least)
     .
• Programming guidelines:
  • Try to use well-named variables, proper indenting, reasonable commenting, etc.
  • Note:  You may not use Java concepts we have not yet covered, including loops (do/while/for), conditionals ("if" statements or ternary operators (?:)), arrays, or methods from any classes in java.util.* (besides Scanner or others we explicitly use) to solve these problems (which isn't a problem for most of you, seeing as we have not yet covered these!).  While they may be helpful, every problem here is solvable without them, and they are not permitted for now.
     
• What to submit
  • Just submit your completed Lab1andrewId.java file.  Do not submit your .class file or any other files.  Just the .java file.
     
• How to submit
  • Send an email with your Lab1andrewId.java file as an attachment to your CA by the submission deadline.  Do not miss the deadline, even by one minute!  Email problems are not a valid excuse for late submissions.
  • You should "cc" yourself in that email, too, just to confirm that you properly sent the email.
     
• Note:
  • Improper submissions will be penalized up to 10 points and may be rejected.
  • Late submissions will be rejected.

Carpe diem!