// CSE 143, Winter 2009, Marty Stepp
// A small testing program to play with various shape objects.
// Demonstrates the polymorphism achieved by interfaces.

public class TestShapes {
    public static void main(String[] args) {
        Circle circ = new Circle(12.0);
        Rectangle rect = new Rectangle(5.0, 7.0);
        Triangle tri = new Triangle(5, 12, 13);
        
        printInfo(circ);
        printInfo(rect);
        printInfo(tri);
        
        // We also declare collections by interface types:
        // Queue<Integer> q = new LinkedList<Integer>();
        // List<String> list = new ArrayList<String>();
    }
    
    // Prints some information about the given shape.
    // Any type of shape can be passed, and that object's version of
    // the behavior will be used.
    public static void printInfo(Shape s) {
        System.out.println("The shape: " + s);
        System.out.println("area : " + s.area());
        System.out.println("perim: " + s.perimeter());
        System.out.println();
    }
}