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Thread: Sorting parallel arrays project - HELP!

  1. #1
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    Default Sorting parallel arrays project - HELP!

    I need the names of the card, rates, and amount owed to print out. however im not sure how to do this. please help. been stuck for too long.
    the class that needs work is the selectionSort class.

    THANKS in advance.


     
    public class sortparallelarrays
    {
     
        public static void  main (String [] args) {
            String [] card = {"Disney Rewards" , "Amazon Rewards", "Chase Sapphire", "Marriott Rewards"};
            double [] rates = {14.24, 13.24, 15.24, 14.20};
            double [] owed = {4500.00, 1300.10, 3200.80, 775.00};
            double amount;
     
     
            displayHeader();
     
            selectionSort(card, rates, owed);
     
     
        }
     
        public static void displayHeader()
        {
            System.out.printf("%8s %9s %10s %16s  \n" , "Card", "Rate of Interest", "Amount owed", "In one year, you'll owe");
     
            System.out.println("===================================================================");
     
     
        }
     
        public static void displayValues(String [] c, double [] r, double [] owed)
        {
            System.out.printf("%8s %18s %25s \n", c, r, owed);
     
        }
     
        public static void selectionSort(String [] card, double [] rates, double [] owed)
        {
            for (int i=0; i< rates.length; i++) {
                for (int j=i+1; j< rates.length; j++){
                    if (rates[j] > rates[i]){
                        double temp = rates[i];
                        rates[i] = rates[j];
                        rates[j] = temp;
     
                        String temppp = card[i];
                        card[i] = card[j];
                        card[j] = temppp;
                        double tempppp = owed[i];
                        owed[i] = owed[j];
                        owed[j] = tempppp;
                    }
                }
            }
            for (int i=0; i<rates.length; i++){
                System.out.println();
                System.out.print( rates[i]);
     
            }
     
        }
     
     
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Sorting parallel arrays project - HELP!

    What does the posted code do wrong? can you print the program's output that shows what the problem is?

    This method is useful for printing out the contents of arrays:
    System.out.println("an ID "+ java.util.Arrays.toString(theArrayName));
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Sorting parallel arrays project - HELP!

    The posted code only will return this


    Card Rate of Interest Amount owed In one year, you'll owe
    ================================================== =================

    15.24
    14.24
    14.2
    13.24


    however, i need it to return the card names, and amount owed.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Sorting parallel arrays project - HELP!

    To print the contents of the other arrays, you need to access elements in those arrays in the print/println/printf method just like you are accessing the element in the array whose values are now printing.

    You could build a String to print out by concatenating separate array elements with +" "+ between them
    or use the printf() method which will format the line for you.
    If you don't understand my answer, don't ignore it, ask a question.

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