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void processShape(Shape s) { s.setColor(Color.red); // ... do stuff s.draw(); } Circle c = new Circle(x, y, r); Point2D v1 = new Point2D(x1, y1); Point2D v2 = new Point2D(x2, y2); Point2D v3 = new Point2D(x3, y3); Triangle t = new Triangle(v1, v2, v3); Point2D c1 = new Point2D(u1, v1); Point2D c2 = new Point2D(u2, v2); Triangle r = new Rectangle(c1, c2); processShape(c); processShape(t); processShape(r); |