how to create time array

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I have an arraylist arr which contains a series of number, like 07, 52, 25, 10, 19, 55, 15, 18, 41. In this list first item is hour, second is minute and third is second, like 07:52:25. Now I want to create a time array in which i can insert these values and do some arithmetic operation like difference between first index and second index, which gives me the time difference. So how can i do that?

ArrayList arr = new ArrayList();
StringTokenizer st = new StringTokenizer(line, ":Mode set - Out of Service In Service");
while(st.hasMoreTokens()){
    arr.add(st.nextToken());
}

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Ok i think i understand what you want your code to do. Heres how i would do it.

public class DateHandler
{
    public DateHandler(int seconds, int minutes, int hours)
    {
        this.seconds = seconds;
        this.minutes = minutes;
        this.hours = hours;
    }

    public String toString()
    {
        return "Seconds: "+seconds+" Minutes: "+minutes+" Hours: "+hours;
    }

    public int seconds;
    public int minutes;
    public int hours;
}

public class Main
{
    public static void main(String args[])
    {
        int[] data = {07, 52, 25, 10, 19, 55, 15, 18, 41}
        int numberOfDates = data.length/3//Divide by 3 because there are 3 numbers per date
        ArrayList<DateHandler> dates = new ArrayList<DateHandler>(numberOfDates);
        for(int x=0;x<numberOfDates;x++)
        {
            int index = x*3;
            DateHandler date = new DateHandler(data[index],data[index+1],data[index+2]);
            System.out.println("added date: "+date.toString());
            dates.add(date);
        }

        //here you can do your calculations.
    }
}

I hope this helped!

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I would use split to tokenise. You can read any amount of times from multi-line data

BufferedReader br = 
String line;
List<Integer> times = new ArrayList<Integer>();
while((line = br.readLine()) != null) {
    String[] timesArr = line.split(", ?");

    for(int i=0;i<timesArr.length-2;i+=3)
        times.add(Integer.parseInt(times[i]) * 3600 +
              Integer.parseInt(times[i+1]) * 60 + 
              Integer.parseInt(times[i+2]));
}
br.close();

System.out.println(times); // prints three times in seconds.
// difference between times
for(int i=0;i<times.size()-1;i++)
   System.out.println("Between "+i+" and "+(i+1)+
       " was "+(times.get(i+1)-times.get(i))+" seconds.");

---

If this array (you said "arraylist arr" right?)

07, 52, 25, 10, 19, 55, 15, 18, 41

means

7:52:25, 10:19:55 and 15:18:41

Then you can use SimpleDateformat to "convert" a string to a date.

SimpleDateFormat can parse ("convert") a String to a Date, and to format a Date to a String (actually a StringBuffer).

In your case, you loop through your ArrayList group the hours, minutes and seconds, and use SimpleDateFormat to parse them:

    int index = 0;
    String tempTime = "";
    ArrayList<Date> dateList = new ArrayList<Date>();

    //assuming hour in format 0-23, if 1-24 use k in place of h
            SimpleDateFormat dateFormat = new SimpleDateFormat("h-m-s-"); 

    for(String timeeElement : timeArrayList)
    {
       tempTime +=  timeeElement;
       tempTime += "-"; //To handle situations when there is only one digit.
       index++;
       if(index % 3 == 0)
       {
          Date d = dateFormat.parse(tempTime, new ParsePosition(0));
          dateList.add(d);
          tempTime = "";
       } 

    }

You have a list of dates to play with now