CSC $205$ Lab $2$ Part I $$ The Clock Class

Creating our Very Own Class with Instance Methods $-$ Clock

Change into your Labs directory by typing cd Labs, and let us create and change into a Lab$2$

directory by typing mkdir Lab$2$ and then cd Lab$2$

Now, use your CalendarDate class as a guide to create a Clock class. Create a file named

Clock.java. Here, we want to create an instance class named Clock that contains the

following variables, methods, and constructors:

$$ Private instance variables that store hours $(0-23),$ minutes $(0-59),$ and seconds $(0-59).$

$$ A constructor that initializes the hours, minutes, and seconds to values specified by the

parameters.

$$ A default constructor with no parameters that sets the hours, minutes, and seconds to $0.$

$$ A method named reset that resets the hours, minutes, and seconds to $0.$ It will have no

parameters.

$$ An overloaded reset method that resets the hours, minutes, and seconds to values

specified by the parameters. It will have three parameters.

$$ A method named advance that advances the clock by one second. If seconds has now

reached $60,$ reset seconds to $0,$ and increment the minutes. If$,$ after incrementing minutes,

minutes has now reached $60,$ reset minutes to $0,$ and increment the hours. If$,$ after

incrementing hours, hours has now reached $24,$ reset hours to $0.$

$$ A toString method that returns hours, minutes, and seconds as a string of the form

$$h:m:s$$

You should end up with a total of $6$ public methods, and $3$ private attributes. Compile your

Clock.java file before moving on to test it$.$

We now need to write a client program named TestClock that contains a main method that we

can use to test our class. In this client program, declare a Clock object named dvr$.$ It will be

constructed using the default constructor. Next, prompt the user to input a specified hours,

minutes, and seconds. Reset your dvr object to this time using the reset method, print it out,

advance it by one second, and then reprint. Compile $($javac TestClock.java$)$ and run $($java

TestClock. Here$$s a sample test case with the user input shown in boldface.

Note: if you have any errors in Clock.java, return to this file, make your changes and this file

will be automatically recompiled for you when you recompile TestClock.java.

What time would you like to set your DVR to$?$

Hours $=23$

Minutes $=59$

Seconds $=59$

The time is now $23$:$59$:$59$

Advancing the time!

The time is now $00$:$00$:$00$