FourMethods

Write a program FourMethods.java that has a main() and four other methods as described below. The main() program call the four methods as needed and display the results.

• The first method is called giveInstructions(). It takes no parameters, and it returns no values. It just prints out an explanation that the program is going to calculate the area of a square.
• The second function is called getInput(). It takes no parameters. It creates a Scanner object, asks the user to enter the length of one side of a square, and returns that value to the main program (where it is stored in a variable).
• The third function is called calculateArea(). It takes a parameter for the length of one side of a square, does a calculation to determine the area, and returns that result to the main program. It doesn't print anything.
• The fourth function is called display(). It takes a parameter for the result of the calculation and prints it out on the screen. It doesn't return anything.

Extension

How could we modify these methods to calculate and print the area of a rectangle, where the lengths of the two sides are different? Java only allows a single return value from a method, so we can't return both length and width.

HINT: Is there some way that we can encapsulate those two values into a single object? An Array or ArrayList could be used to hold the two values, or a Pair object could store the two values.