发布网友 发布时间:2小时前
共2个回答
热心网友 时间:43分钟前
抽象类:
public abstract class Square {
public abstract double sanjiaoxing(double l,double h);
public abstract double zhengfangxing(double a,double b);
public abstract double yuanxing(double r);
}
实现类:
public class Shixian extends Square{
@Override
public double sanjiaoxing(double l, double h) {
double s=0.5*h*l;
return s;
}
@Override
public double yuanxing(double r) {
double s=3.14*r*r;
return s;
}
@Override
public double zhengfangxing(double a, double b) {
double s=a*b;
return s;
}
public static void main(String[] args) {
Shixian shixian=new Shixian();
System.out.println(shixian.sanjiaoxing(2, 3));//求出三角形的面积
System.out.println(shixian.zhengfangxing(2, 3));//求出正方形的面积
System.out.println(shixian.yuanxing(2));//求出圆形的面积
}
}
热心网友 时间:47分钟前
JAVA的类那一节里有相似的例子的,去看看吧,很基本的东西