Class Poly (The Application)

private Polyhedron p1, p2, p3;

public static void main(String [] argv) {

Poly thisApp = new Poly();

thisApp.p1 = new Cube(5);

thisApp.p2 = new Tetrahedron(10, 8, 7);

thisApp.p3 = new RectangularParallelopiped(2, 3, 4);

thisApp.p1.describe();

thisApp.p2.describe();

thisApp.p3.describe();

}