JAVA实现银行账户管家

创建一个名为“Account”的抽象类，有三个为“CheckingAccount”、“SavingsAccount”和“BusinessAccount”的子类。通过类似ATM的程序

package 银行账户管家;
 public abstract class Account {
      String name;//账户名
      Double money;//存款
      String pasword;//密码
       //还款
       public void repay(Double rem){}

        //借出
        public void loan(Double lem){}

        //查询存款
        public double get_money(){return money;}

    }

package 银行账户管家;

import java.util.Scanner;

public class BusinessAccount extends Account {
    Double credit;//利率
    Double limitmoney;//贷款额度
    BusinessAccount(String n,String p,Double m){
        name=n;
        pasword=p;
        money=m;
        credit=0.1;
        limitmoney=money*0.5;
    }
    //存钱
    public void repay(Double remoney){
        money+=remoney;
        limitmoney=money*0.5;
    }
    //取款
    public void loan(Double lemoney){
        if(lemoney<limitmoney+money){
            money-=lemoney;
            limitmoney=money*0.5;
        }
        else
            System.out.println("您的账户余额不够");
    }
    public double get_money(){
        System.out.println("请输入存款时间");
        Scanner sc= new Scanner(System.in);
        Integer period=sc.nextInt();
        money=get_credit_money(period);
        return money;
    }
    public double get_credit_money(Integer days){
        Integer m=days/30;
        Integer d=days%30;
        money+=money*credit*m;
        money+=money*(credit/100)*d;
        limitmoney=money*0.5;
        return money;
    }
}

package 银行账户管家;

public class CheckingAccount extends Account {
    CheckingAccount(String n,String p,Double m){
        name=n;
        pasword=p;
        money=m;
    }
    public void repay(Double remoney){
        money+=remoney;
    }
    public void loan(Double lemoney){
        if(lemoney<money)
            money-=lemoney;
        else
            System.out.println("您的余额不足");
    }
    public double get_money(){
        return money;
    }
}
package 银行账户管家;

import java.util.Scanner;

public class SavingsAccount extends Account {
    Double credit;
    Integer limitperm;
    Integer times;
    SavingsAccount(String n,String p,Double m){
        name=n;
        pasword=p;
        money=m;
        credit=0.02;
        limitperm=2;
        times=0;
    }
    //还款
    public void repay(Double remoney){
        times++;
        if(times<=limitperm)
            money+=remoney;
        else
            money=money+remoney-(times-limitperm)*2;
    }
    //取钱
    public void loan(Double lemoney){
        times++;
        if(times<=limitperm){
            if(lemoney<money)
                money-=lemoney;
            else
            System.out.println("您的账户余额不够");
        }
        else
            money=money-lemoney-(times-limitperm)*2;
    }
   //查询余额
    public double get_money(){
        System.out.println("请输入存款时间");
        Scanner sc= new Scanner(System.in);
        Integer period=sc.nextInt();
        money=get_credit_with_money(period);
        return money;
    }
    //计算利息
    public double get_credit_with_money(Integer p){
        Integer m=p/30;
        Integer day=p%30;
        money+=money*credit*m;
        money+=money*(credit/90)*day;
        return money;
    }
}
package 银行账户管家;

import java.util.Scanner;

public class ATM {
    public  static void main(String args[]){
        System.out.println("请输入账号密码以及存款");
        Scanner sc=new Scanner(System.in);
        String name=sc.next();
        String pasword=sc.next();
        Double money=sc.nextDouble();
        System.out.println("请选择账户类型：1-CheckingAccount  2-SavingsAccount 3-BusinessAccount");
        Integer choice=sc.nextInt();
        switch (choice){
                case 1:
                    CheckingAccount checkingAccount=new CheckingAccount(name,pasword,money);
                    System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                    Integer ch=sc.nextInt();
                    while(ch!=4){
                        switch (ch){
                            case 1:
                                System.out.println("存钱数额为：");
                                Double mon=sc.nextDouble();
                                checkingAccount.repay(mon);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                ch=sc.nextInt();
                                break;
                            case 2:
                                System.out.println("取款数额为：");
                                Double m=sc.nextDouble();
                                checkingAccount.loan(m);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                ch=sc.nextInt();
                                break;
                            case 3:
                                Double mo=checkingAccount.get_money();
                                System.out.println("本账户余额为:  "+mo);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                ch=sc.nextInt();
                                break;
                        }
                    }
                    break;
                case 2:
                    SavingsAccount savingsAccount=new SavingsAccount(name,pasword,money);
                    System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                    Integer cho=sc.nextInt();
                    while(cho!=4){
                        switch (cho){
                            case 1:
                                System.out.println("存钱数额为：");
                                Double mon=sc.nextDouble();
                                savingsAccount.repay(mon);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                cho=sc.nextInt();
                                break;
                            case 2:
                                Double m=sc.nextDouble();
                                savingsAccount.loan(m);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                cho=sc.nextInt();
                                break;
                            case 3:
                                Double mo=savingsAccount.get_money();
                                System.out.println("本账户余额为:  "+mo);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                cho=sc.nextInt();
                                break;

                        }
                    }
                    break;
                case 3:
                    BusinessAccount businessAccount=new BusinessAccount(name,pasword,money);
                    System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                    Integer choi=sc.nextInt();
                    while (choi!=4){
                        switch (choi){
                            case 1:
                                System.out.println("存钱数额为：");
                                Double mone=sc.nextDouble();
                                businessAccount.repay(mone);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                choi=sc.nextInt();
                                break;
                            case 2:
                                System.out.println("存钱数额为：");
                                Double mon=sc.nextDouble();
                                businessAccount.loan(mon);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                choi=sc.nextInt();
                                break;
                            case 3:
                                Double mo=businessAccount.get_money();
                                System.out.println("本账户余额为:  "+mo);
                                System.out.println("请选择操作：1-存钱 2-取钱 3-查询余额 4-退出");
                                choi=sc.nextInt();
                                break;
                        }
                    }
                    break;
            }
    }


}