Consider a class RatingScore that represents a numeric rating for something such as a movie. Its attributes are

Question

• A description of what is being rated
• The maximum possible rating
• The rating
It will have methods to
• Get the rating from a user
• Return the maximum rating possible
• Return the rating
• Return a string showing the rating in a format suitable for display
a. Write a method heading for each method.
b. Write preconditions and postconditions for each method.
c. Write some Java statements that test the class.
d. Implement the class.

Answer 1

a) ```
public void inputRating()
public int getMaxRating()
public int getRating()
public String getRatingString()
```

b)
public void inputRating()
Precondition: maximum rating is positive.
Postcondition: A value for the rating was obtained from the user. The rating was greater than or equal to zero and less than or equal to the maximum possible rating. The rating attribute was changed to the value obtained from the user.

public int getMaxRating()
Precondition: none.
Postcondition: The maximum rating was returned.

public int getRating()
Precondition: none.
Postcondition: The rating was returned.

public String getRatingString()
Precondition: none.
Postcondition: The rating was returned in some nicely formatted string.

c&d)
See the code in RatingScore.java.