java实现简易会员管理系统

好的，下面是一个简易的Java会员管理系统，包含添加会员、删除会员、查询会员信息等功能。

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

public class MemberManagementSystem {
    
    private ArrayList<Member> members;
    
    public MemberManagementSystem() {
        members = new ArrayList<Member>();
    }
    
    public void addMember(Member member) {
        members.add(member);
        System.out.println("会员添加成功！");
    }
    
    public void deleteMember(int memberId) {
        for (int i = 0; i < members.size(); i++) {
            if (members.get(i).getMemberId() == memberId) {
                members.remove(i);
                System.out.println("会员删除成功！");
                return;
            }
        }
        System.out.println("未找到该会员！");
    }
    
    public void queryMember(int memberId) {
        for (int i = 0; i < members.size(); i++) {
            if (members.get(i).getMemberId() == memberId) {
                System.out.println(members.get(i));
                return;
            }
        }
        System.out.println("未找到该会员！");
    }
    
    public void showAllMembers() {
        System.out.println("所有会员信息如下：");
        for (int i = 0; i < members.size(); i++) {
            System.out.println(members.get(i));
        }
    }
    
    public static void main(String[] args) {
        MemberManagementSystem system = new MemberManagementSystem();
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加会员");
            System.out.println("2. 删除会员");
            System.out.println("3. 查询会员信息");
            System.out.println("4. 显示所有会员信息");
            System.out.println("5. 退出系统");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    System.out.println("请输入会员姓名：");
                    String name = scanner.next();
                    System.out.println("请输入会员编号：");
                    int memberId = scanner.nextInt();
                    Member member = new Member(name, memberId);
                    system.addMember(member);
                    break;
                case 2:
                    System.out.println("请输入会员编号：");
                    memberId = scanner.nextInt();
                    system.deleteMember(memberId);
                    break;
                case 3:
                    System.out.println("请输入会员编号：");
                    memberId = scanner.nextInt();
                    system.queryMember(memberId);
                    break;
                case 4:
                    system.showAllMembers();
                    break;
                case 5:
                    System.out.println("感谢使用会员管理系统！");
                    System.exit(0);
                default:
                    System.out.println("无效操作，请重新选择！");
                    break;
            }
        }
    }
    
}

class Member {
    
    private String name;
    private int memberId;
    
    public Member(String name, int memberId) {
        this.name = name;
        this.memberId = memberId;
    }
    
    public String getName() {
        return name;
    }
    
    public int getMemberId() {
        return memberId;
    }
    
    public String toString() {
        return "会员姓名：" + name + "，会员编号：" + memberId;
    }
    
}

这个会员管理系统包含一个`MemberManagementSystem`类和一个`Member`类。`Member`类表示会员，包含会员姓名和会员编号两个属性，还有一个`toString()`方法用于返回会员的字符串表示。`MemberManagementSystem`类包含一个会员列表`members`，包含添加会员、删除会员、查询会员信息和显示所有会员信息等方法，还有一个`main()`方法用于交互式操作。