Alarm Clock Using JAVA

/**
An alarm clock should include a time to sound the alarm as well as methods
to set the alarm.
*/
public class AlarmClock extends Clock
{
    public int alarmHour;
    public int alarmMinute;
    public int alarmSecond;

    //Constructors
    public AlarmClock()
    {
        super();
        alarmHour = 0;
        alarmMinute = 0;
        alarmSecond = 0;
    }

    public AlarmClock(int theHour, int theMinute, int theSecond, int alarmH, int alarmM, int alarmS)
    {
        super(theHour, theMinute, theSecond);
        setAlarmHour(alarmH);
        setAlarmMinute(alarmM);
        setAlarmSecond(alarmS);
    }

    //Accessors
    public void setAlarmHour(int alarmH)
    {
        if((alarmH >= 0) && (alarmH <= 24))
            alarmHour = alarmH;
        else
            System.out.println("Fatal error: invalid alarm hour");
    }

    public void setAlarmMinute(int alarmM)
    {
        if((alarmM >= 0) && (alarmM <= 59))
            alarmMinute = alarmM;
        else
            System.out.println("Fatal error: invalid alarm minute");
    }

    public void setAlarmSecond(int alarmS)
    {
        if((alarmS >= 0) && (alarmS <= 59))
            alarmSecond = alarmS;
        else
            System.out.println("Fatal error: invalid alarm second");
    }
    //Mutators
    public int getAlarmHour()
    {
        return alarmHour;
    }

    public int getAlarmMinute()
    {
        return alarmMinute;
    }

    public int getAlarmSecond()
    {
        return alarmSecond;
    }

    public String getCurrentAlarmTime()
    {
        return "The alarm is set to " + alarmHour + ":" + alarmMinute + ":" + alarmSecond;
    }

    //Facilitators
    public String toString()
    {
        return "The current time is " + getHour() + ":" + getMinute() + ":" +
                getSecond() + "\nThe alarm is set to " + getAlarmHour() + ":" +
                getAlarmMinute() + ":" + getAlarmSecond();
    }

    public boolean equals(Object o)
    {
        if(o == null)
            return false;
        else if(getClass() != o.getClass())
            return false;
        else
        {
            AlarmClock otherClock = (AlarmClock) o;
            return((getHour() == otherClock.getHour()) && (getMinute() == otherClock.getMinute())
                    && (getSecond() == otherClock.getSecond()) && (alarmHour == otherClock.alarmHour)
                    && (alarmMinute == otherClock.alarmMinute) && (alarmSecond == otherClock.alarmSecond));
        }

    }

}