JAVA面向对象编程经典小项目之银行账户及银行用户管理系统------JAVA入门基础教程

package EXER;

public class Account
{
    private int id;
    private double balance;
    private double annualInterestRate;

    public Account(int i,double b,double a)
    {
        id = i;
        balance = b;
        annualInterestRate = a;
    }

    public int getId() {
        return id;
    }

    public double getBalance() {
        return balance;
    }

    public double getAnnualInterestRate() {
        return annualInterestRate;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    public void setAnnualInterestRate(double annualInterestRate) {
        this.annualInterestRate = annualInterestRate;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + getId() +
                ", balance=" + getBalance() +
                ", annualInterestRate=" + getAnnualInterestRate() +
                '}';
    }
    public void withdraw(double amount)//取钱
    {
        if(amount <= balance && amount > 0)
        {
            balance = balance - amount;
            System.out.println("成功取出"+amount);
        }
        else
        {
            System.out.println("余额不足");
        }
    }
    public void deposit(double amount)//存款
    {
        if(amount > 0)
        {
            balance = balance + amount;
            System.out.println("存入成功");
        }
    }
}

package EXER;

public class Account
{
    private int id;
    private double balance;
    private double annualInterestRate;

    public Account(int i,double b,double a)
    {
        id = i;
        balance = b;
        annualInterestRate = a;
    }

    public int getId() {
        return id;
    }

    public double getBalance() {
        return balance;
    }

    public double getAnnualInterestRate() {
        return annualInterestRate;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    public void setAnnualInterestRate(double annualInterestRate) {
        this.annualInterestRate = annualInterestRate;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + getId() +
                ", balance=" + getBalance() +
                ", annualInterestRate=" + getAnnualInterestRate() +
                '}';
    }
    public void withdraw(double amount)//取钱
    {
        if(amount <= balance && amount > 0)
        {
            balance = balance - amount;
            System.out.println("成功取出"+amount);
        }
        else
        {
            System.out.println("余额不足");
        }
    }
    public void deposit(double amount)//存款
    {
        if(amount > 0)
        {
            balance = balance + amount;
            System.out.println("存入成功");
        }
    }
}

package EXER;

public class Bank
{
    private Customer[] customers;
    private int numberOfCustomer;
    public Bank(int num)
    {
        customers = new Customer[num];
    }
    public void addCustomer(String f,String j)
    {
        Customer c = new Customer("f","j");
        customers[numberOfCustomer++] = c;
    }

    public int getNumberOfCustomer()
    {
        return numberOfCustomer;
    }

    public Customer getCustomer(int index)
    {
        if(index < 0 || index >= numberOfCustomer)
        {
            System.out.println("错误");
            return null;
        }
        else
        {
            return customers[index];
        }
    }
}

package EXER;

public class Bank
{
    private Customer[] customers;
    private int numberOfCustomer;
    public Bank(int num)
    {
        customers = new Customer[num];
    }
    public void addCustomer(String f,String j)
    {
        Customer c = new Customer("f","j");
        customers[numberOfCustomer++] = c;
    }

    public int getNumberOfCustomer()
    {
        return numberOfCustomer;
    }

    public Customer getCustomer(int index)
    {
        if(index < 0 || index >= numberOfCustomer)
        {
            System.out.println("错误");
            return null;
        }
        else
        {
            return customers[index];
        }
    }
}

package EXER;

public class Customer
{
    private String firstName;
    private String lastName;
    private Account account;

    public Customer(String f,String l)
    {
        firstName = f;
        lastName = l;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Account getAccount()
    {
        return account;
    }

    public void setAccount(Account account)
    {
        this.account = account;
    }
}

package EXER;

public class Customer
{
    private String firstName;
    private String lastName;
    private Account account;

    public Customer(String f,String l)
    {
        firstName = f;
        lastName = l;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Account getAccount()
    {
        return account;
    }

    public void setAccount(Account account)
    {
        this.account = account;
    }
}

package EXER;

public class Test
{
    public static void main(String[] args)
    {
        Customer c1 = new Customer("Jane","Smith");
        c1.setAccount(new Account(1000,2000.0,0.0123));
        Account a = c1.getAccount();
        c1.getAccount().deposit(100);
        c1.getAccount().withdraw(960);
        c1.getAccount().withdraw(2000);
        System.out.println(c1.getAccount().toString());
        System.out.println(a.toString());
        Bank b = new Bank(10);
        b.addCustomer("曹","操");
        b.addCustomer("刘","备");
        b.getCustomer(0).setAccount(new Account(1000,2000.0,0.0123));
        b.getCustomer(0).getAccount().withdraw(100);
        System.out.println(b.getCustomer(0).getAccount().toString());
    }
}

package EXER;

public class Test
{
    public static void main(String[] args)
    {
        Customer c1 = new Customer("Jane","Smith");
        c1.setAccount(new Account(1000,2000.0,0.0123));
        Account a = c1.getAccount();
        c1.getAccount().deposit(100);
        c1.getAccount().withdraw(960);
        c1.getAccount().withdraw(2000);
        System.out.println(c1.getAccount().toString());
        System.out.println(a.toString());
        Bank b = new Bank(10);
        b.addCustomer("曹","操");
        b.addCustomer("刘","备");
        b.getCustomer(0).setAccount(new Account(1000,2000.0,0.0123));
        b.getCustomer(0).getAccount().withdraw(100);
        System.out.println(b.getCustomer(0).getAccount().toString());
    }
}