• 1. set which takes an appropriate parameter and sets the appropriate member variable to the new value.
• 2. get which returns the value of the member variable.
• setNumber is a special case. You are responsible for verifying that the number is a 16 digit number of the format "dddd_dddd_dddd_dddd" where d is digit and _ indicates a whitespace. The number should aways be verified (even using the second constructor described above).
  • To verify the String is correct, you will want to treat it like an array using the method char charAt(int i) which will return the character held at position i similar to the way int getSampleValueAt(i) worked for Sounds.
  • A character is a basic type (see Chapter 2) and you can use ==, >=, <=, !=, etc. to perform the comparison.
  • If the number is invalid - you should notify the user by printing an error and set it to a default value of "0000 0000 0000 0000." Please see the tester and test output for more details.
• The Expiration Date is another special case. You are responsible for ensuring that the year is greater than 1950, the day is between 1 and 31, and the month is between 1 and 12. Note: Not all dates allowed by these rules are valid (for example, 2/31/2000). You are not required to handle this issue, but are welcome to if you wish. If an invalid value is provided, please set to it to a default value (month = 1, day = 1, or year = 2000).

You will create a toString method which takes no parameters and returns a String.

• At the top of your class, place: import java.text.*
• When you wish to format the number, do the following:
  • DecimalFormat df = new DecimalFormat () ;
  • df.setMaximumFractionDigits ( 2 ) ;
  • df.setMinimumFractionDigits ( 2 ) ;
  • System.out.print(df.format(mydouble));
• Where mydouble is a double type.

Testing your method (in an application): For this assignment, you MUST use our tester application. You may download it here. We recommend you review the testing application prior to starting the assignment - it will help you in understanding what is required of you.

• Please note: This tester does NOT test for all possible failure conditions and represents a basic testing method. More extenstive automated testing is often applied in industy.

The output should match the output below exactly. (You can use the output to determine default values, etc.)

How to turnin your homework electronically

When you are ready to turn in your homework, first open a terminal window by right clicking on the empty area of your computer's desktop (have to use lab computers or remotely connect from your home computer using SSH or Putty) and select "Open a New Terminal". Then, run bundlePSA10 from your PSA10/bookClasses directory. Files are required to be submitted for PSA10:

• CreditCard.java

-bash-2.05b$  cd ~/PSA10/bookClasses 

-bash-2.05b$  bundlePSA10 

Good; all required files are present:

	CreditCard.java

Do you want to go ahead and turnin these files? [y/n] y

OK.  Proceeding.


Performing turnin of approx. XXXX bytes
Copying to /home/linux/ieng6/cs8f/turnin.dest/cs8wxx.PSA10
.
Done.
Total bytes written: XXXX
Please check to be sure that's reasonable.
Turnin successful.

Make sure the Turnin is successful, otherwise we won't receive your submission! . If you want to make changes after you've turned in your homework, make the changes and run bundlePSA10 again. The program will warn you that a "previously turned-in file exists" and ask if "you wish to over-write this existing file". Respond in the affirmative by typing y and pressing the Enter key.

Getting your interview done INDIVIDUALLY

10% of your grade on this assignment will come from an interview you will have with one of the tutors during Open Lab Hours. You have 48 weekday hours after the electronic turnin deadline to get your interview done. The deadline for the interview for PSA10 is Thurs March 12th (theoretically at midnight, but actually by the end of the last tutor hour scheduled). Remember, the tutors may be busy after 4pm helping CSE8B students

You get an interview by going into B260 during a scheduled tutor hour. Find the tutor, ask them if you can interview for the 8A PSA. If they have others who are waiting for interviews, your name will go on the end of the list of people waiting. Interviews take about 5 minutes each. It is your responsibility to go in early enough that you can get your interview completed. If everyone waits until the last hour on Thurs, this will not work.

For the interview you will need to have a copy of your team's assignment in your account. If you are using your partner's account to submit the files, make sure you email them to yourself and save them under your account so that you have them available for the interview. The tutor will ask you to log in, change to the directory where your work is and then to follow their directions. They will ask you to run your program to show that it works, open files in Dr. Java (or your favorite editor), and ask you questions about HOW your code works. Additionally, they may question you as to how you would (theoretically) make small changes to the program to have it do something slightly different. You will not actually be required to change your code.

Learning to be able to explain your problem solving process and discuss code with another human being is a very important professional skill. We hope that this process will help you develop this skill.