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Thread: Two ArrayLists don't cycle thru formula

  1. #1
    Junior Member
    Join Date
    Jan 2019
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    Default Two ArrayLists don't cycle thru formula

    I want to create a loop
    which takes the top number from each array
    and plugs it in to a formula
    all the way through the arraylist.

    One array has 12 temperatures in F, such as 89.1 and so forth
    The other array has 12 relative humidities.

    I've gotten it down to the loop and the formula, but it doesn't work. I think I am missing something simple.
    The formula is for the so-called Heat Index.

     * Write a description of class HeatIndex here.
     * @author (your name)
     * @version (a version number or a date)
    import java.util.ArrayList;
    import java.io.File;
    import java.io.IOException;
    import java.util.Scanner;
    public class HeatIndex{
    public static void main(String [] args) throws IOException
       //  int index = 0;
         double [] KeyWestTemp = new double[12];
         int [] KeyWestHumid = new int[12];
         File KeyWestTempFile = new File("KeyWestTemp.txt");
         File KeyWestHumidFile = new File("KeyWestHumid.txt");
         Scanner inFile1 = new Scanner(KeyWestTempFile);
         Scanner inFile2 = new Scanner(KeyWestHumidFile);
      // Print to file Thing
          ArrayList<Double> Temp = new ArrayList<>();
          while (inFile1.hasNext()) {
        ArrayList<Integer> Hume = new ArrayList<>();
          while (inFile2.hasNext()) {
        for(String number: Hume) //?
         number * heatIndex;  // have to figure out the correct way to multiply things within a loop.
     // In the formula below,the values should be drawn, one by one, from the two arrays. and it should give twelve 
    //results, because there are twelve humidity values and twelve temperature values. Any help would be great. 
       double heatIndex = -42.379 + 2.0490153*"Temp" + 10.14333127*"Hume" - 0.22475541*"Temp"*"Hume"-6.8783*10^3*"Temp"^2 - 5.481717*10^-2*"Hume"^2 + 8.5282*10^-4*"Temp"*"Hume"^2 - 1.99*10^-6*"Temp"^2*"Hume"^2
     //    for(int Gooba : KeyWestTemp)
    //     System.out.println(Gooba);
          //  inFile1.close();   
    Last edited by Norm; January 2nd, 2019 at 06:42 AM. Reason: Fixed code tags

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,465 Times in 2,416 Posts

    Default Re: Two ArrayLists don't cycle thru formula

    it doesn't work
    Please explain.
    Are there error messages? Please copy the full text and paste it here.
    Is the output incorrect? Copy and paste the output here and explain what is wrong with it.

    Fixed the code tags:


    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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