/**
 * Write a description of class Time here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Time
{
    private int hour; // 0 - 23
    private int minute; // 0 - 59
    private int second; // 0 - 59

    Time(){
    }

    // set a new time value using universal time; throw an
    // exception if the hour, minute or second is invalid.
    public void setTime (int h, int m, int s)
    {
        // validate hour, minute and second
        if ((h >= 0 && h < 24) && ( m >= 0 && m < 60) && (s >= 0 && s < 60))
        {
            hour = h;
            minute = m;
            second = s;
        } // end if
        else
        {
            throw new IllegalArgumentException
            ("hour, minute and/or second was out of range");
        }
    } // end method setTime

    // convert to String in universal-time format (HH:MM:SS)
    public String toUniversalString()
    {
        return String.format ("%02d:%02d:%02d", hour, minute, second);
    } // end method toUniversalString

    // convert to String in standard-time format (H:MM:SS AM or PM)
    public String toString()
    {
        return String.format ("%d:%02d:%02d %s",
            (( hour == 0 || hour == 12 ) ? 12 : hour % 12),
            minute, second, (hour < 12 ? "AM" : "PM"));
    } // end method toString
}