import java.util.Calendar;
class Main {
public static String getTimeDif(Calendar cal1, Calendar cal2) {
long milis1 = cal1.getTimeInMillis();
long milis2 = cal2.getTimeInMillis();
long diff = milis2 - milis1;
long diffSeconds = diff / 1000;
long diffMinutes = diff / (60 * 1000);
String tmp = diffMinutes + " dk. " + (diffSeconds - diffMinutes * 60)
+ " sn " + (diff - (diffSeconds * 1000)) + " ms.";
return tmp;
}
}