righttriangle.java

Java程序设计技巧与开发实例附书源代码。

class RightTriangle
    extends Rectangle
{
   RightTriangle(double _width, double _height)
   {
      super(_width, _height);
      type = "Triangle";
   }

   public void computeArea()
   {
      area = 0.5 * width * height;
   }

   public void computePerimeter()
   {
      perim = width + height + Math.sqrt(width * width + height * height);
   }
}