谁能教教我，这个应该怎么写

import java.util.Scanner;
public class Hello {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        Phone huawei = new Phone( "华为", 5.5, 3688.88, "8+128g 全面刘海");
        Phone millet = new Phone( "小米", 5.0, 2988.88, "4+64g  全面屏  ");
        System.out.println("品牌型号："+huawei.brand+"\n尺寸:"+huawei.size+"\n价格:"+huawei.price+"\n配置:"+huawei.configuration);
        System.out.println("请输入华为手机库存");
        huawei.stock =  s.nextInt();
        huawei.total_price = huawei.stock * huawei.price;
        System.out.println("品牌型号："+millet.brand+"\n尺寸:"+millet.size+"\n价格:"+millet.price+"\n配置:"+millet.configuration);
        System.out.println("请输入小米手机库存");
        millet.stock=  s.nextInt();
        millet.total_price = millet.stock * millet.price;
        System.out.println("------------库存清单-------------");
        System.out.println("品牌型号\t尺寸\t价格\t\t\t配置\t\t库存数量\t总价");
        System.out.println(huawei.brand+"\t\t"+huawei.size+"\t"+huawei.price+"\t"+huawei.configuration+"\t"+huawei.stock+"\t"+huawei.total_price);
        System.out.println(millet.brand+"\t\t"+millet.size+"\t"+millet.price+"\t"+millet.configuration+"\t"+millet.stock+"\t"+millet.total_price);
        System.out.println("--------------------------------\n总库存："+(huawei.stock+millet.stock)+"\n库存总价："+(huawei.total_price+millet.total_price)+"￥");
    }

}

class Phone {
    int stock; //库存数量
    String brand;
    double size;
    double price;
    String configuration;
    double total_price; //总价

    public Phone(String brand, double size, double price, String configuration) {
        this.brand = brand;
        this.size = size;
        this.price = price;
        this.configuration = configuration;
    }

}