我的笔记 食品管理

import java.util.*;

public class guangli {

    public static void main(String[] args)throws Exception

    {

        Spgl aa=new Spgl();

        Scanner in=new Scanner(System.in);

        try

        {

            while(true)

            {

                System.out.println("请按下方提示进行操作");

                System.out.println("添加食品请输入1");

                System.out.println("查找食品信息请输入2");

                System.out.println("修改食品价格请输入3");

                System.out.println("删除食品请输入4");

                System.out.println("退出系统请输入0");

                String  number=in.next();

                if(number.equals("1"))

                {

                    System.out.println("请输入食品的编号");

                    String bh=in.next();

                    System.out.println("请输入食品名称");

                    String mc=in.next();

                    System.out.println("请输入食品的价格");

                    float jg=in.nextFloat();

                    Sp sp=new Sp(bh,mc,jg);

                    aa.addSp(sp);

                }

                else if(number.equals("2"))

                {

                    System.out.println("请输入食品的编号");

                    String bianhao=in.next();

                    aa.Spxx(bianhao);

                }

                else if(number.equals("3"))

                {

                    System.out.println("请输入食品编号");

                    String bianhao=in.next();

                    System.out.println("请输入食品价格");

                    float jiage=in.nextFloat();

                    aa.Spxg(bianhao,jiage);

                }

                else if(number.equals("4"))

                {

                    System.out.println("请输入要删除的食品编号");

                    String bianhao=in.next();

                    aa.Sprm(bianhao);

                }

                else if(number.equals("0"))

                {

                    System.out.println("感谢您的使用");

                    System.exit(0);

                }

                else

                {

                    System.out.println("输入有误");

                }

            }

        }catch(Exception e)

        {

            System.out.println("输入有误");

        }

    }

}

class Sp

{

    private String bianhao;

    private String name;

    private float jiage;

    public String getBianhao() {

        return bianhao;

    }

    public void setBianhao(String bianhao) {

        this.bianhao = bianhao;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public float getJiage() {

        return jiage;

    }

    public void setJiage(float jiage) {

        this.jiage = jiage;

    }

    Sp(String bianhao,String name,float jiage)

    {

        this.bianhao=bianhao;

        this.name=name;

        this.jiage=jiage;

    }

}

class Spgl

{

    private ArrayList A=null;

    Spgl()

    {

        A=new ArrayList();

    }

    public void addSp(Sp sp)

    {

        A.add(sp);

        System.out.println("添加食品成功");

    }

    public void Spxx(String bianhao)

    {

        int i=0;

        for(i=0;i<A.size();i++)

        {

            Sp b=(Sp)A.get(i);

            String bh=b.getBianhao();

            if(bh.equals(bianhao))

            {

                System.out.println("食品的编号为:"+bh);

                System.out.println("食品名称为:"+b.getName());

                System.out.println("食品价格为:"+b.getJiage());

                break;

            }

        }

        if(i==A.size())

        {

            System.out.println("输入有误查无此物");

        }

    }

    public void Spxg(String bianhao,float jiage)

    {

        int i=0;

        for( i=0;i<A.size();i++)

        {

            Sp b=(Sp)A.get(i);

            if(b.getBianhao().equals(bianhao))

            {

                b.setJiage(jiage);

                System.out.println("修改成功");

                break;

            }

        }

        if(i==A.size())

        {

            System.out.println("输入有误查无此物");

        }

    }

    public void Sprm(String bianhao)

    {

        int i=0;

        for(i=0;i<A.size();i++)

        {

            Sp b=(Sp)A.get(i);

            if(b.getBianhao().equals(bianhao))

            {

                A.remove(i);

                break;

            }

        }

        if(i==A.size())

        {

            System.out.println("输入有误查无此物");

        }

    }

}