sortingshapes.java

Java程序设计技巧与开发实例附书源代码。

public class SortingShapes
{
   public static void showShapes(String title, Shape shapes[])
   {
      System.out.println(title);
      for (int i = 0; i < shapes.length; i++)
      {
         System.out.println(shapes[i]);
      }
   }

   public static void main(String args[])
   {
      Rectangle r[] =
          {
          new Rectangle(2, 6),
          new Rectangle(3, 3), new Rectangle(1, 4)};
      Circle c[] =
          {
          new Circle(3), new Circle(2), new Circle(1)};
      for (int i = 0; i < r.length; i++)
      {
         r[i].computeArea();
         r[i].computePerimeter();
         c[i].computeArea();
         c[i].computePerimeter();
      }
      showShapes("Unsorted Rectangles", r);
      Sorter.sort(r);
      showShapes("Sorted Rectangles", r);
      showShapes("Unsorted Circles", c);
      Sorter.sort(c);
      showShapes("Sorted Circles", c);
   }
}