Java: convert seconds into day, hour, minute and seconds using TimeUnit

Simple method:

public static void calculateTime(long seconds) {
    long sec = seconds % 60;
    long minutes = seconds % 3600 / 60;
    long hours = seconds % 86400 / 3600;
    long days = seconds / 86400;

    System.out.println("Day " + days + " Hour " + hours + " Minute " + minutes + " Seconds " + sec);
}

You can do like this to only use TimeUnit:

public static void calculateTime(long seconds) {
    int day = (int) TimeUnit.SECONDS.toDays(seconds);
    long hours = TimeUnit.SECONDS.toHours(seconds) -
                 TimeUnit.DAYS.toHours(day);
    long minute = TimeUnit.SECONDS.toMinutes(seconds) - 
                  TimeUnit.DAYS.toMinutes(day) -
                  TimeUnit.HOURS.toMinutes(hours);
    long second = TimeUnit.SECONDS.toSeconds(seconds) -
                  TimeUnit.DAYS.toSeconds(day) -
                  TimeUnit.HOURS.toSeconds(hours) - 
                  TimeUnit.MINUTES.toSeconds(minute);
    System.out.println("Day " + day + " Hour " + hours + " Minute " + minute + " Seconds " + second);
}

or the slightly shorter but maybe not as intuitive

public static void calculateTime(long seconds) {
    int day = (int) TimeUnit.SECONDS.toDays(seconds);
    long hours = TimeUnit.SECONDS.toHours(seconds) -
                 TimeUnit.DAYS.toHours(day);
    long minute = TimeUnit.SECONDS.toMinutes(seconds) -
                  TimeUnit.HOURS.toMinutes(TimeUnit.SECONDS.toHours(seconds));
    long second = TimeUnit.SECONDS.toSeconds(seconds) -
                  TimeUnit.MINUTES.toSeconds(TimeUnit.SECONDS.toMinutes(seconds));
    System.out.println("Day " + day + " Hour " + hours + " Minute " + minute + " Seconds " + second);
}

It should be like

 int day = (int)TimeUnit.SECONDS.toDays(seconds);        
 long hours = TimeUnit.SECONDS.toHours(seconds) - (day *24);
 long minute = TimeUnit.SECONDS.toMinutes(seconds) - (TimeUnit.SECONDS.toHours(seconds)* 60);
 long second = TimeUnit.SECONDS.toSeconds(seconds) - (TimeUnit.SECONDS.toMinutes(seconds) *60);

EDIT Explanation:

1. Day calculation is correct, it does not require explanation.
2. TimeUnit.SECONDS.toHours(seconds) will give you direct conversion from seconds to hours without consideration for days you have already calculated. Minus the hours for days you already got i.e, day*24. You now got remaining hours.
3. Same for minute and second. You need to minus the already got hour and minutes respectively.