java创建矩形类，不会了

import java.util.Scanner;
public class Rectangel {
    double x; //矩形的长
    double y; //矩形的宽
    double Area(double x,double y) {
        double area;
        area=x*y;
        return area;
    } //计算矩形的面积
    double Zhouchang(double x,double y) {
        double zhouchang;
        zhouchang=2*(x+y);
        return zhouchang;
    }//计算矩形的周长

    public  static void main (String [] arges) {
        Scanner in = new Scanner(System.in);
        double x=in.nextDouble();
        double y=in.nextDouble();
        if(x==y) {
            System.out.println("形状：正方形");
        }else {
            System.out.println("形状：长方形");
        }
        System.out.println("长："+x);
        System.out.println("宽："+y);
        Rectangel rectangle =new Rectangel ();
        double area1=rectangle.Area(x, y);
        double zhouchang1=rectangle.Zhouchang(x, y);
        System.out.println("面积："+area1);
        System.out.println("周长："+zhouchang1);
        in.close();
    }
}