Time

public class Time
{
    private int hour; // 0 - 23
    private int minute; // 0 - 59
    private int second; // 0 - 59

    //constructor to set the time
    public Time(int hour, int minute, int second)
    {
        //check if set time is correct
        if ((hour >= 0 && hour < 24) && ( minute >= 0 && minute < 60) && (second >= 0 && second < 60))
        {
            this.hour = hour;
            this.minute = minute;
            this.second = second;
        } else {
            this.hour = 0;
            this.minute = 0;
            this.second = 0;
        }
    }
    //to 24 hour format
    public String to24HourFormat()
    {
        return String.format ("%02d:%02d:%02d", hour, minute, second);
    }

    //to 12 hour format AM/PM
    public String to12HourFormat()
    {
        //is it am or pm
        String dayOrNight;
        if (hour < 12) {
            dayOrNight = "AM";
        } else {
            dayOrNight = "PM";
        }
        //get current hour by modulo
        if (hour == 0 || hour == 12) {
            hour = 12;
        } else {
            hour = hour % 12;
        }
        return String.format ("%d:%02d:%02d %s", hour, minute, second, dayOrNight);
    }
}