shapetester.java

Java程序设计技巧与开发实例附书源代码。

public class ShapeTester
{ // main 方法
   public static void main(String args[])
   {
      Rectangle r = new Rectangle(2.0, 3.);
      Circle c = new Circle(4.0);
      r.computeArea();
      r.computePerimeter();
      c.computeArea();
      c.computePerimeter();
      System.out.println(r);
      System.out.println(c);
   }
}