jlab0506.java

java教程中的编程实例

public class JLab0506{
       public static void main(String[] args){
               Circle c=new Circle(2.0);
               Rectangle x=new Rectangle(3.0,4.0);
               System.out.println(c.getabout()+"\n"+
                                  "area is:"+c.area()+"\n"+
                                  "perimeter is:"+c.perimeter());
               System.out.println(x.getabout()+"\n"+
                                  "area is:"+x.area()+"\n"+
                                  "perimeter is:"+x.perimeter());
                }
}