Joe Chung
Monmouth U. Homepage

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====== Programming Lab Exercise ======

  * Topics: Implementing Classes

==== Counter.java, TestCounter.java ====

{{http://mitrees.com/image/cache/data/catalog/GS/53029_TallyCounter-500x500.jpg?100}}

In DrJava, define a class called //Counter// in //Counter.java//.

An object of this class is used to count things, so it records a count that is a non-negative whole number.

In the //Counter// class, include methods to set the counter to 0 (reset), to increase the count by 1, and to decrease the count by 1. Also include an accessor method that returns the current count value, as well as a method that displays the count using //System.out.println//.


__Notes:__

Use the "private" access modifier for the Counter class instance variable.

Use these names for the Counter class methods:
<code>
   resetCount    - set the counter to 0
   increaseCount - to increase the count by 1
   decreaseCount - to decrease the count by 1
   getCount      - accessor method that *returns* the current count value
   showCount     - method that displays the value of the count
</code>

In //TestCounter.java// do the following:
<code>
   - Declare a Counter class object variable called mycount.
   - Reset mycount.
   - Increase mycount 3 times.
   - Show mycount. (Output should be: "Current value of count is 3")
   - Decrease mycount 4 times.
   - Show mycount. (Output should be: "Current value of count is -1")
   - Reset mycount again.
   - Show mycount. (Output should be: "Current value of count is 0")
</code>

Links to source code: [[https://piazza.com/class_profile/get_resource/hzkswvpxv2r2nu/i0hcxk99dun2z2|Counter.java]], [[https://piazza.com/class_profile/get_resource/hzkswvpxv2r2nu/i0hcxnipdmk30f|TestCounter.java]]

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