2020.8.24第四十九天

例 9.2双构造函数

public class cjava {
    public static void main(String[] args) {
        Box b1=new Box();
       System.out.println("The volume of box1 is "+b1.volume());
        Box b2=new Box(15,30,25);
       System.out.println("The volume of box2 is "+b2.volume());
}
}
class Box{
    int height;
    int width;
    int length;
    Box(){
        height=10;
        width=10;
        length=10;
    }
    Box(int h,int w,int len){
        height=h;
        width=w;
        length=len;
    }
    int volume() {
       return (height*width*length);
    }
}

 

 2.遇到的问题：无

3.明天继续写例题。