public class Clock
{
    private int hr;  //store hours
    private int min; //store minutes
    private int sec; //store seconds


          //Default constructor
	      //Postcondition: hr = 0; min = 0; sec = 0
    public Clock()
    {
  	    setTime(0, 0, 0);
    }

          //Constructor with parameters, to set the time
          //The time is set according to the parameters
	      //Postcondition: hr = hours; min = minutes; sec = seconds
    public Clock(int hours, int minutes, int seconds)
    {
	    setTime(hours, minutes, seconds);
    }

          //Method to set the time
          //The time is set according to the parameters
	      //Postcondition: hr = hours; min = minutes; sec = seconds
    public void setTime(int hours, int minutes, int seconds)
    {
	    if (0 <= hours && hours < 24)
	        hr = hours;
	    else
	        hr = 0;

        if (0 <= minutes && minutes < 60)
	        min = minutes;
	    else
	        min = 0;

	    if (0 <= seconds && seconds < 60)
	        sec = seconds;
	    else
	        sec = 0;
    }

          //Method to return the hours
	      //Postcondition: The value of hr is returned.
    public int getHours()
    {
	    return hr;
    }

          //Method to return the minutes
	      //Postcondition: The value of min is returned.
    public int getMinutes()
    {
	    return min;
    }

          //Method to return the seconds
	      //Postcondition: The value of sec is returned.
    public int getSeconds()
    {
        return sec;
    }

          //Method to print the time
 	      //Postcondition: Time is printed in the form hh:mm:ss
    public void printTime()
    {
 	    if (hr < 10)
	        System.out.print("0");
        System.out.print(hr + ":");

	    if (min < 10)
	        System.out.print("0");
	    System.out.print(min + ":");

	    if (sec < 10)
	        System.out.print("0");
        System.out.print(sec);
    }

         //Method to increment the time by one second
	     //Postcondition: The time is incremented by one second
	     //If the before-increment time is 23:59:59, the time
 	     //is reset to 00:00:00.
    public void incrementSeconds()
    {
        sec++;

	     if (sec > 59)
	     {
	         sec = 0;
	         incrementMinutes(); //increment minutes
	     }
    }

          //Method to increment the time by one minute
          //Postcondition: The time is incremented by one minute.
	      //If the before-increment time is 23:59:53, the time
  	      //is reset to 00:00:53.
    public void incrementMinutes()
    {
	    min++;

	    if (min > 59)
	    {
	        min = 0;
	        incrementHours(); //increment hours
	    }
    }

          //Method to increment the time by one hour
          //Postcondition: The time is incremented by one hour.
	      //If the before-increment time is 23:45:53, the time
	      //is reset to 00:45:53.
    public void incrementHours()
    {
	    hr++;

	    if (hr > 23)
 	       hr = 0;
    }

          //Method to compare the two times
	      //Postcondition: Returns true if this time is equal to
	      //               otherClock; otherwise returns false.
    public boolean equals(Clock otherClock)
    {
        return (hr == otherClock.hr
 	            && min == otherClock.min
                && sec == otherClock.sec);
    }

         //Method to copy the time
	     //Postcondition: The instance variables of otherClock are
         //               copied into the corresponding data members
         //               of this time.
         //               hr = otherClock.hr; min = otherClock.min;
         //               sec = otherClock.sec.
    public void makeCopy(Clock otherClock)
    {
        hr = otherClock.hr;
        min = otherClock.min;
        sec = otherClock.sec;
    }

 	      //Method to return a copy of the time
	      //Postcondition: A copy of the object is created
          //               and a reference of the copy is returned.
    public Clock getCopy()
    {
	    Clock temp = new Clock();

	    temp.hr = hr;
	    temp.min = min;
	    temp.sec = sec;

	    return temp;
    }
}