Java/MyTime.java at main · SeherBalibay/Java · GitHub

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public class MyTime {
    int hour, minute;


    public MyTime(int hour, int minute) {
        this.hour = hour;
        this.minute = minute;
    }

    @Override
    public String toString() {
        return (hour < 10 ? "0":"") + hour + ":" + (minute < 10 ? "0":"")+minute;
    }

    public void incrementHour() {
        incrementHour(1);
    }

    public int incrementHour(int diff) {
        int dayDiff = 0;
        if (hour + diff < 0)
            dayDiff = -1;
        dayDiff += (hour + diff) / 24;
        hour = (hour + diff) % 24;
        if (hour < 0)
            hour += 24;
        return dayDiff;
    }

    public int incrementMinute(int diff) {
        int hourDiff = 0;
        if (minute + diff < 0)
            hourDiff = -1;
        hourDiff += (minute + diff) / 60;
        minute = (minute + diff) % 60;
        if (minute < 0)
            minute += 60;
        return incrementHour(hourDiff);
    }

    public int totalMinutesDifference(MyTime anotherTime) {
        int thisTotalMinutes = hour * 60 + minute;
        int anotherTotalMinutes = anotherTime.hour * 60 + anotherTime.minute;
        return Math.abs(thisTotalMinutes - anotherTotalMinutes);
    }

    public boolean isAfter(MyTime time) {
        return (hour * 60) + minute > (time.hour * 60) + time.minute;
    }
    public boolean isBefore(MyTime time) {
        return (hour * 60) + minute < (time.hour * 60) + time.minute;
    }
}