Q18: More Classes

Take out a piece of paper and put your name on the upper right corner.

For this problem, you should write a very simple but complete class. The class represents a counter that counts up or down starting at 0.

• The name of the class should be Counter.
• It has one private instance variable representing the value of the counter.

• It has three instance methods:

  • increment() adds one to the counter value,
  • decrement() subtracts one from the counter value, and
  • getValue() returns the current counter value.

Write a complete definition for the class, Counter.

Finish your class before the timer runs out.