面向对象（上）综合练习1：Account和Customer

账户 Account类

package day1_11;
//银行账户
public class Account {
    private int id; //账号
    private double balance;//余款
    private double annualInterestRate;//年利率

    public int getId() {
        return id;
    }

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

    public double getBalance() {
        return balance;
    }

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

    public double getAnnualInterestRate() {
        return annualInterestRate;
    }

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

    public Account(int id, double balance, double annualInterestRate) {
        this.id = id;
        this.balance = balance;
        this.annualInterestRate = annualInterestRate;
    }

    //取钱
    public void withdraw(double amount) {
        if (balance < amount) {
            System.out.println("余额不足，取款失败");
            return;
        }
        balance -= amount;
        System.out.println("成功取出," + amount);
    }

    //存钱
    public void deposit(double amount) {
        if (amount > 0) {
            balance += amount;
            System.out.println("成功存入，" + amount);
        }
    }
}

客户  Customer类

package day1_11;

//客户
public class Customer {
    private String firstName;//名
    private String lastName;//姓
    private Account account;//账户

    public Customer() {

    }

    public Customer(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public Account getAccount() {
        return account;
    }

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

 

测试类 CustomerTest类

package day1_11;

public class CustomerTest {
    public static void main(String[] args) {
        Customer customer = new Customer("Jane", "Smith");
        Account account = new Account(1001, 2000, 0.0123);
        customer.setAccount(account);
        //存钱100
        customer.getAccount().deposit(100);
        //取钱960
        customer.getAccount().withdraw(960);
        //取钱2000
        customer.getAccount().withdraw(2000);
        //打印客户的账户信息
        System.out.println("Customer [" + customer.getLastName() + "," + customer.getFirstName()
                            +"] has a account: id is " + account.getId() + ",annualInterestRate is "
                            + account.getAnnualInterestRate() + ",balance is " + account.getBalance());
    }
}

运行结果