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Homework answers / question archive / JAVA Programming A
JAVA Programming
A. You're the oldest in your family and you want to write a program to help your youngest sibling with their arithmetic. Use the 'DO WHILE' loop (P204) to create a menu of options (Addition, Subtraction, Multiplication, or Exit). Based on the option, display two numbers that your sibling can calculate and enter the answer. If the answer is correct, then congratulate them; otherwise, show them the correct answer. You may use JOptionPane or Scanner. Hints/Tips: - Use Random Class to get numbers (p249) and use (100) to limit the numbers - You can use \n in JOptionPane to create the menu - You can use .toUpperCase() (p75) at the end of JOptionPane to make it uppercase - When you add numbers in JOptionPane, you must put them in 0 or it prints each - Do addition first and run it to make sure it works, then add one at a time to it - It took me about 45 minutes Rubric: - Doesn't use "do while" statement -5 (no credit for this part of the assignment) - Doesn't do one of the math functions -3 (-1 for each missing function) - Doesn't display menu -.5 - Doesn't show results -.5 - Doesn't follow programming conventions -.5 B. You are the supervisor for a lawn maintenance company and you need to keep up with employee pay. Write a program that uses the 'WHILE' loop (p200) which does the following.
The while loop should ask the user for the employee number, gross pay, state tax, federal tax, and FICA withholding until the employee number is 0. After the data is entered, the program should display totals for gross pay, state tax, federal tax, FICA withholding, and net pay (gross less the others). You may use Scanner or JOptionPane to gather and display your data. Hints/Tips: - The output does not have to be formatted (JOptionPane centers, so it's hard to align) - You can use parse with JOptionPane to get input in one line (but don't have to) - The employee number will not be printed since we're only printing totals - It took me about 22 minutes Rubric: - Doesn't use the while loop -5 (no credit for this part of the assignment) - Doesn't ask for all the variables -1 (-.25 for each variable) - Doesn't print the totals -1 - The loop doesn't work
C. You work for an automotive dealership and the owner wants you to write an amortization schedule report. Ask the user for the loan amount, # of payments, interest rate, and payment amount. The program should use the for loop (p207) print the amortization schedule. The columns should be: Year Balance Payment Interest Principle New Balance 1 429,700.84 86,500 51,564.10 34,935.90 394,764.94
Balance starts with the initial loan amount, then New Balance Payment is from the user Interest is the Balance ' Interest Rate (make sure to use .12 for 12%) Principle is Payment - Interest (this should get bigger while interest gets smaller each time) New Balance is Balance - Principle (and is what you will use for the next iteration) For testing purposes (because it works to a zero remaining amount at the end), use the following input parameters - Balance 429,700.84, Payment 86,500, Interest 12%, and Term is 8 years, but it would be good to use other amounts too. Assume the payments are made annually, and thus, not divided by 12 for a monthly rate. Hints/Tips: - This will work best to use Scanner and printf, instead of JOptionPane - You'll likely need multiple \t (tabs) to line up the columns - Put any math used in the printf in parenthesis - ex: (yr+1) - If you don't use the sample data, it may not end on zero (extra logic is needed for the final payment, but not necessary for this assignment) - It took me about 30 minutes Rubric: - Doesn't use for loop -5 (no credit for this part of the assignment) - Doesn't ask for the variables -.5 - Doesn't calculate prin, int, and new balance correctly -.5 - Doesn't print all the columns -.5 - Doesn't print the correct year -.1
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