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);
    }
}