Use the following file:
SquareTester.java
/**
This program tests the Square class.
*/
public class SquareTester
{
public static void main(String[] args)
{
Square mySquare = new Square(2);
System.out.println("Area: " + mySquare.getArea());
System.out.println("Expected: 4");
System.out.println("Perimeter: " + mySquare.getPerimeter());
System.out.println("Expected: 8");
System.out.println("Diagonal length: " + mySquare.getDiagonalLength());
System.out.println("Expected: 2.828427125");
}
}