rectangle.java

Java程序设计技巧与开发实例附书源代码。

public class Rectangle
    extends Shape
{
   protected double width, height;
   public Rectangle(double _width, double _height)
   {
      type = "Rectangle";
      width = _width;
      height = _height;
   }

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

   public void computePerimeter()
   {
      perim = 2 * width + 2 * height;
   }

   public String toString()
   {
      return super.toString() + "\n\tWidth = " + width + "\n\tHeight = " +
          height;
   }
}