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  • 命令行界面的简单银行系统

    先是一个银行类:

    package com.Testabstract;
    
    import java.util.*;
    public class Bank
    {
        //ArrayList<String> account = new ArrayList<String>();
    
    
            public static void main(String[] args){
                    CreditAccount credit = new CreditAccount();
                    DebitAccount debit = new DebitAccount();
                    Account account = new Account();
            System.out.println("*********************************");
            System.out.println("*"+"                               "+"*");
            System.out.println("*"+"                               "+"*");
            System.out.println("*"+"     欢迎使用银行管理系统      "+"*");
            System.out.println("*"+"                               "+"*");
            System.out.println("*"+"                               "+"*");
            System.out.println("*********************************");
            Scanner sc = new Scanner(System.in);
            while(true){
                System.out.print("请输入指令(1:开户 2:登录 3:退出):");
                byte sel = sc.nextByte();
                switch(sel){
                case 1:
                    System.out.print("请选择您要开户的类型(1:借记卡   2:信用卡):");
                    byte select = sc.nextByte();
                    if(select==1){
                        System.out.print("您选择了借记卡,");
                        debit.openAccount();
                        debit.showAccount();
                    }else{
                        System.out.print("您选择了信用卡,");
                        credit.openAccount();
                        credit.showAccount();
                    }
                    break;
                case 2:
                    //应该使用name.startWith("")方法增加一个判定,如何账户的第一个数为1,
                    //则应该使用借记卡的login()方法,如果第一个数为2,则调用信用卡的
                    //login();方法,
                    account.login();
                    System.out.println("登录成功,你的卡片类型为借记卡!");
                    while(true){
                    System.out.print("请输入指令(1、存款 2、取款 3、退出)");
                    byte select1 = sc.nextByte();
                    switch(select1){
                        case 1:
                            debit.deposit();
                            break;
                        case 2:
                            debit.withdraw();
                            break;
                        case 3:
                            break;
                    }
                    if(select1==3)
                        break;
                    }
                case 3:
                    System.out.println("谢谢使用,再见!");
                    System.exit(0);
                }
                sc.close();
            }
        }
    }

    再是银行卡类:

    import java.util.*;
    public class  Account
    {
        private int id = 1001;
        private String name = null;
        private String password = "12345678";
        private int personID = 0;
        private String email = null;
        public double blance = 0;
        Scanner input = new Scanner(System.in);
    
        public Account(){   //无参构造方法
        }
    
        public Account(int id,String name,String password,int personID,String email,double blance){    //构造方法
        this.id = id;  //传参时一定要定义参数
        this.name = name;
        this.password = password;
        this.email = email;
        this.blance = blance;
        }
    
        public int getID(){ //返回值是什么类型的,方法的类型就是什么。
            return id;
        }
    
        public String getName(){
            return name;
        }
    
        public  String getPassword(){
            return password;
        }
    
        public int getPersonID(){
            return personID;
        }
    
        public String getEmail(){
            return email;
        }
    
        public double getBlance(){
            return blance;
        }
    
        public double deposit(){   //存款
            System.out.print("请输入存款金额:");
            double money = input.nextDouble();
            System.out.println("存款成功!");
            blance = blance+money;
            System.out.println("您现在的存款金额为:"+getBlance());
            return blance;
        }
    
        public double withdraw(){   //取款
            System.out.print("请输入取款金额:");
            double money = input.nextDouble();
            if(money>blance)
            System.out.println("对不起,您的余额不足!");
            else{
            blance = blance-money;
            System.out.println("取款成功!你的预存款余额还剩:"+getBlance());
            }
            return blance;
        }
    
        public void showAccount(){
            System.out.println("卡号:"+getID());
            System.out.println("姓名:"+getName());
            System.out.println("身份证号:"+getPersonID());
            System.out.println("邮箱:"+getEmail());
            System.out.println("预存款金额:"+getBlance());
        }
    
        public void openAccount()
        {
            id = id+1;
            System.out.print("请输入用户名:");
            name = input.next();
            String word1;
            String word2;
            while(true){System.out.print("请输入密码:");
            word1 = input.next();
            if(word1.length()<8)
                System.out.println("密码小于8位,请重新输入!");
            else
                break;
            }
    
    
            while(true){
                System.out.print("请再次输入密码:");
                word2 = input.next();
            
            if(!word2.equals(word1))
                System.out.println("两次密码不一致!请重新输入!");
            else
                break;
            }
            
            System.out.print("请输入身份证号:");
            personID = input.nextInt();
    
            while(true){
                System.out.print("请输入邮箱:");
                email = input.next();
    
            if(!email.endsWith(".com"))
                System.out.println("邮箱格式不正确,请重新输入!");
            else
                break;
            }
    
            System.out.print("请输入预存款金额:");
            blance = input.nextDouble();
    
            System.out.println("开户成功!");
        }
    
        public void login(){
            while(true){System.out.print("请输入账号:");
                int tempID = input.nextInt();
                if(tempID!=id)
                        System.out.println("账号错误,请重新输入!");
                else
                    break;
                }
    
    
            while(true){
                System.out.print("请输入密码:");
                String tempPassword = input.next();
            
                    if(!tempPassword.equals(password))
                        System.out.println("密码错误!请重新输入!");
                    else
                        break;
            }
        }
    }

    信用卡继承自银行卡类:

    public class CreditAccount extends Account  //信用卡类继承Account类
    {
        private double ceiling = 10000;
    
        public CreditAccount(){}
    
        public CreditAccount(int id,String name,String password,int personID,String email,double blance,double ceiling){
            super(id,name,password,personID,email,blance);
            //super(name);
            //super(password);
            //super(personId);
            //super(email);
            //super(blance);
            this.ceiling = ceiling;
        }
    
        public double withdraw(double money,double ceiling){
            if(blance+ceiling<money){
                System.out.println("超过透支额度,请重新输入!");
            }else{
                System.out.println("取款成功!");
                blance = blance-money;
            }
            return blance;
        }
    }

    借记卡类没有实现:写了一部分。

    public class DebitAccount extends Account
    {
        public DebitAccount(){}
    
    
        public DebitAccount(int id,String name,String password,int personID,String email,double blance){
        super(id,name,password,personID,email,blance);
        }
    }
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  • 原文地址:https://www.cnblogs.com/plumsq/p/7554492.html
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