1    package expressions;
2    import shapes. SSquare;
3    import shapes. SCircle;
4    public class ShapesThing {
5        public static void main(String[] args) {
6            SSquare square = new SSquare(400);
7            System.out.println("square = " + square.toString());
8            System.out.println("area of square =" + square.area());
9            System.out.println("perimeter of square=" + square.perimeter());
10           System.out.println("diagonal of square =" + square.diagonal());
11   
12   
13           SCircle disk = square.inscribingCircle();
14           System.out.println("disk = " + disk.toString());
15           System.out.println("area of disk =" + disk.area());
16           System.out.println("perimeter of disk= " + disk.perimeter());
17   
18           //computations on another square
19           SSquare diamond = disk.inscribingSquare();
20           System.out.println("diamond =" + diamond.toString());
21           System.out.println("area of diamond =" + diamond.area());
22       }
23   }
24