Something

class RectangleTest{
        public static void main(String[] args)
        {
                //create a object named rect1
                Rectangle rect1 = new Rectangle(10, 10);

                //set the width to be 20, length to be 30 by calling setLength and setWidth
                System.out.println("The rect1's length is " + rect1.getLength() + ", the rect1's with is " + rect1.getWidth());

                rect1.setLength(30);
                rect1.setWidth(20);


                //set the width to be 20, length to be 30 by calling setLength and setWidth
                System.out.println("The rect1's length is " + rect1.getLength() + ", the rect1's with is " + rect1.getWidth());
        }
}