Write a class Square whose constructor receives the length of the sides. Then supply methods to compute

The area and perimeter of the square

The length of the diagonal (use the Pythagorean theorem)

You need to supply the following class in your solution:

Square

Use the following class as your tester class:

/** 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"); } }