InterestRate Create an InterestRate class and InterestRateViewer client class to do the following: A person is purchasing an item with their credit card.

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Presentation transcript:

InterestRate Create an InterestRate class and InterestRateViewer client class to do the following: A person is purchasing an item with their credit card. Launch an input dialog window and have the user enter a short description of the item they are purchasing. Remember the JOptionPane.showInputDialog method that we used in an earlier class? Have the user input the amount of the purchase (in whole dollars – i.e. integer) into an input dialog window. Have the user input (into another input dialog window) the monthly interest rate they are paying on this purchase. Note that this may include decimal places (i.e. they would enter 5.75 to represent 5.75%). Your program should take these values and do the following:  Calculate the amount the user will be charged in interest if they don’t pay off this credit card purchase after the first month.  Print the following information to the console: You purchased for dollars. Your monthly interest rate is %. You will be charged in interest after the first month. Test with a few scenarios and print out your code and the results

Integer.parseInt int Integer.parseInt(String str) Use the static method parseInt of the Integer class to convert a string to an integer This is helpful when prompting a user in an input dialog window for an integer The string must be an integer or the program will throw a NumberFormatException error. Examples: String cash = “20"; int dollarAmt = Integer.parseInt(cash); Java Concepts 4.6 (Strings)

Double.parseDouble double Double.parseDouble(String str) Use the static method parseDouble of the Double class to convert a string to a floating point number This is helpful when prompting a user in an input dialog window for a floating point number The string must be an floating point number or an integer or the program will throw a NumberFormatException error. Examples: String cash = "19.75"; double cashAmt = Double.parseDouble(cash); double dollarAmt = Double.parseDouble("20"); Java Concepts 4.6 (Strings)