コード例 #1
0
 @Override
 public double computeSquare(AbstractShape shape) {
   double square = 0;
   if (shape instanceof Triangle) {
     Triangle triangle = (Triangle) shape;
     square = 1 / 2 * triangle.getA() * triangle.getB() * Math.sin(triangle.getAngle());
   } else {
     throw new IllegalArgumentException("Incompatible shape: " + shape.getClass());
   }
   return square;
 }
コード例 #2
0
 @Override
 public double computePerimeter(AbstractShape shape) {
   double perimeter = 0;
   if (shape instanceof Triangle) {
     Triangle triangle = (Triangle) shape;
     perimeter = triangle.getA() + triangle.getB() + triangle.getC();
   } else {
     throw new IllegalArgumentException("Incompatible shape: " + shape.getClass());
   }
   return perimeter;
 }