shapetester.java

Java程序设计技巧与开发实例附书源代码。

public class ShapeTester
{
   public static void main(String args[])
   {
      Shape s = new Shape();
      Rectangle r = new Rectangle(2.0, 3.);
      Circle c = new Circle(4.0);
      r.computeArea();
      r.computePerimeter();
      c.computeArea();
      c.computePerimeter();
      r.display();
      c.display();
      s.display();
   }
}