Question

I have two different arrays an ArrayList of doubles and an Array of Strings

 public class tester {

        private final static String TIME[]={ "8:00", "9:00", "10:00", "11:00", 
            "12:00", "13:00", "14:00", "15:00", "16:00", "17:00", "18:00", "19:00"  };


        public static void main(String[] args){
            ArrayList<Double> stat = new ArrayList<>();
            stat.add(1.0);
            stat.add(2.0);
            stat.add(3.0);
            stat.add(4.0);
            stat.add(5.0);
            stat.add(6.0);
            stat.add(7.0);
            stat.add(8.0);
            stat.add(9.0);
            stat.add(10.0);
            stat.add(11.0);
            stat.add(12.0);
            int i = 0;
            for (String time : TIME) {
                System.out.println(time+" "+stat.get(i));
                i++;
            }

My question is quite simple is this the best way to loop through each array if I want to get the same position of each array to match? so that stat.get(0) ==TIME.get(0)?

Update

First of all thank you all for your quick response i like the idea of creating a class however there is something you need to know.

The thing you saw was a test class that i use to test my data.

i KNOW that the two arrays will ALWAYS be the same size due to the fact that the stat ArrayList normally defined like the following:

stat is a calculated value of data gained from the database the value of stat is based on time and then sent back to the GUI to be put into a graph and a table.

This means that for each of the TIME there is an exisiting value so that stat.get(0) is ALWAYS equal to TIME.get(0) == “8:00”.

With this in mind do you still think i should create a class or should i keep the class showed below and then add a HashMap containing the data then iterate over that map to insert the data in my GUI?

public class Statistics {
    private ArrayList<CallQueue> queues = new ArrayList<CallQueue>();
    private ArrayList<Double> averageData = new ArrayList<Double>();
    private Provider p;

    public Statistics(){
         try {
            this.p = new Provider();
        } catch (DopeDBException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /**
     * This recursive method calculates the average of each time table and then adds its to the arrayList in the following order:
     * 8.00  = 0
     * 9.00  = 1
     * 10.00 = 2
     * 11.00 = 3
     * 12.00 = 4
     * 13.00 = 5
     * 14.00 = 6
     * ect.
     * @param time
     */
    public void calculateAverage(){
        int data = 0;
        for (int i = 8; i < 20; i++) {
            for (CallQueue cq : queues) {
                data += cq.getCallsByTime(i);
            }
            if (data == 0) {
                Main.createErrorMessage("Fejl i dataen! \r\n kontakt venligst ansvarlige i Dope");
            }
            averageData.add((double) data/11);
        }
    }
    /**
     * @author MRCR
     * This method recives the object list from the database and sets the currentlist to the list recived.
     */
    public void setQueues(Calendar start, Calendar end){
        try {
            queues = p.getInformation(start, end, queues);
        } catch (DopeDBException e) {
            // TODO Auto-generated catch block
            Main.createErrorMessage("Message");
        } catch (DopeResultSetException e) {
            // TODO Auto-generated catch block
            Main.createErrorMessage("Message");
        }

    }
    /**
     * This method returns the calculated DataList list.
     * @author MRCR
     * @return averageData
     */
    public ArrayList<Double>getData(Calendar start, Calendar end){
        setQueues(start, end);
        calculateAverage();
        return averageData;
    }



}


import java.util.HashMap;


public class CallQueue {
    private String type;
    private HashMap<Integer, Integer> data = new HashMap<Integer,Integer>();
    public CallQueue(String type){
        this.type = type;
    }
    public String getType(){
        return type;
    }
    public int getCallsByTime(int time){
        return data.get(time);

    }
    public void addCallsByTime(int hourOfDay, int callAmount) {
        data.put(hourOfDay, callAmount);

    }

}

Answer 1

I would first check that the lengths of the 2 arrays are the same.
Then iterate using a for loop:

final int timeLength = TIME.length;
if (timeLength != stat.size()) {
    //something may not be right
}
for (int i = 0; i < timeLength; i++) {
    System.out.println(time[i]+" "+stat.get(i));
}