{

private int hour; // 0 - 23

private int minute; // 0 - 59

private int second; // 0 - 59

// 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;

}

else

throw new IllegalArgumentException(

"hour, minute and/or second was out of range");

}

// convert to String in universal-time format (HH:MM:SS)

public String toUniversalString()

{

return String.format("%02d:%02d:%02d", hour, minute, second);

}

// 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"));

}