<<Java语言程序设计>>进阶篇 Exercise8_7

最新推荐文章于 2022-08-01 10:02:18 发布

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最新推荐文章于 2022-08-01 10:02:18 发布

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本文详细介绍了Java账户管理系统的设计与实现，包括账户的基本属性、操作方法以及关键功能的实现，通过实例展示了如何创建、读取、更新和删除账户信息。

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class Account{
  private int id = 0;
  private double balance = 0;
  private double annualInterestRate = 0;
  java.util.Date dateCreated = new java.util.Date();
  
  public Account(){
  }
  
  public Account(int id,double balance){
    this.id = id;
    this.balance = balance;
  }
  
  public int getID(){
    return id;
  }
  public void setID(int newID){
    this.id = newID;
  } 
  
  public double getBalance(){
    return balance;
  }
  public void setBalance(double newBalance){
    this.balance = newBalance;
  }
  
  public double getAnnualInterestRate(){
    return annualInterestRate;
  }
  public void setAnnualInterestRate(double newAnnualInterestRate){
    this.annualInterestRate = newAnnualInterestRate;
  }
  
  public String getDate(){
    return dateCreated.toString();
  }
  
  public double getMonthlyInterestRate(){
    return this.annualInterestRate / 12.0;
  }
  
  public void withDraw(double newMoney){
    this.setBalance(this.balance - newMoney);
  }
  public void deposit(double newMoney1){
    this.setBalance(this.balance + newMoney1);
  }
}

public class TestAccount{
  public static void main(String[] args){
    Account account = new Account(1122,20000.0);
    account.setAnnualInterestRate(0.045);
  
    account.withDraw(2500.0);
    account.deposit(3000.0);
  
    System.out.println("Balance: " + account.getBalance() + 
      "\nMonthlyInterestRate: " + account.getMonthlyInterestRate() + 
      "\nAccount's created date: " + account.getDate());
  }
}