强行加入继承应该怎么做

Question

请各位吴彦祖看看这个代码！

package Commodity;
import Commodity.commodity;

import java.util.ArrayList;
import java.util.List;
import  java.util.Scanner;
public class caidan {
    public static void main(String[] args){
        ArrayList <commodity>list= new ArrayList<>();
        while (true){
        System.out.println("欢迎来到商品管理系统");
        System.out.println("请选择您需要的服务");
        System.out.println("1.添加商品");
        System.out.println("2.删除商品");
        System.out.println("3.修改商品");
        System.out.println("4.查询商品");
        System.out.println("5.退出");
        Scanner sc =new Scanner(System.in);
        String choose = sc.next();
        switch (choose) {
            case "1" -> add(list);
            case "2" -> delete(list);
            case "3" -> xiugai(list);
            case "4" -> chaxun(list);
            case "5" -> {
                System.out.println("退出");
                System.exit(0);
            }
            default -> System.out.println("不好意思！您的选项有误");
        }

        }
    }

    //添加商品：
    public static void add( ArrayList<commodity> list){
        System.out.println("添加商品");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入商品的id：");
        String name = sc.nextLine();
        System.out.println("请输入商品的姓名");
        String id = sc.nextLine();
        System.out.println("请输入商品的价格");
        int prise = sc.nextInt();
        commodity x =new commodity(name,id,prise);
        list.add(x);
        System.out.println("添加成功！");
    }
    







    //删除商品：
    public static void delete( ArrayList <commodity>list){
        System.out.println("删除商品");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入要删除的商品id");
        int id =sc.nextInt();
        list.remove(id-1);
        System.out.println("id为"+id+"的商品删除成功");
    }
    //修改商品：
    public static void xiugai( ArrayList <commodity>list){
        System.out.println("修改商品");
        System.out.println("请输入你想修改的商品序号");
        Scanner sc=new Scanner(System.in);
        int id=sc.nextInt();
        list.remove(id-1);

        System.out.println("请将新商品的名称输入");

        Scanner n=new Scanner(System.in);
        String name=n.nextLine();
        System.out.println("请输入新商品的价格");
        Scanner a=new Scanner(System.in);
        int price= n.nextInt();
        commodity c=new commodity("id",name,price);
        list.add(c);






    }
    //查询商品：
    public static void chaxun( ArrayList <commodity>list){
        System.out.println("查询商品");
        if(list.size() ==0){
            System.out.println("没有这个商品，请添加");
            return;
        }
        System.out.println("id\t,name\t,prise\t");
        for (int i = 0; i < list.size(); i++) {
            commodity com=list.get(i);
            System.out.println(com.getId()+"\t"+com.getName()+"\t"+com.getPrise()+"\t");

        }
    }

}






package Commodity;

import java.util.ArrayList;
import java.util.Scanner;

class commodity {
    private String id;
    private String name;
    private int prise;

    public commodity() {

    }

    public commodity(String id, String name, int prise) {
        this.id = id;
        this.name = name;
        this.prise = prise;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPrise() {
        return prise;
    }

    public void setPrise(int prise) {
        this.prise = prise;
    }
   

}

修改商品有些问题，帮忙看一看。
还有就是，如果我要强行加入一个继承，应该怎么去加呀。

Answer 1

1.你的id并不是数组的索引，无法删除
2.修改的时候你传的"id"这个字符串，不是动态的值
3.强行加继承是什么意思，请说出具体的需求