shape.java

Java程序设计技巧与开发实例附书源代码。

public class Shape
{  protected String name;
   protected double area, perimeter;

   public Shape()
   {  name = "undetermined";
      area = perimeter = 0;
   }
   public void display()
   {  System.out.println("Name: " + name);
      System.out.println("Area: " + area);
      System.out.println("Perimeter: " + perimeter);
   }
}