Question

Java编程：建立一个银行账户类BankAccount

该类数据成员包括：（1）户名m_iName（2）账户金额m_dBalance（3）年利率m_dInterestRate
该类的成员函数包括：（1）构造函数BankAccount，设置户名、账户金额、利率的初始值，构造函数重载；（2）函数getBalance，获取账户金额；（3）函数getInterestRate，获取当前利率；（4）函数setInterestRate，设置当前利率；（5）函数printAccountMsg，打印当前账户信息；（6）函数saveMoney，存款操作；（7）函数getMoney，取款操作；（8）函数caculateInterest（int Days）按当前利率当前存款计算给定天数的净利息。
建应用程序类ExampleAccount，在应用函数类的main函数中完成以下操作（1）建一个BankAccount类的对象；（2）打印账户信息；（3）存入一笔钱；（4）打印账户信息；（5）取出一笔钱；（6）打印账户信息；（7）计算十年后的银行存款额并打印；（8）改变利率后计算十年后的银行存款额并打印。

Answer 1

public class BankAccount {
private String m_iName;
private double m_dBalance;
private double m_dInterestRate;

public BankAccount(){
m_iName="";
m_dBalance=0.0;
m_dInterestRate=0.0;
}

public BankAccount(String name, double balance, double interestRate) {
m_iName = name;
m_dBalance = balance;
m_dInterestRate = interestRate;
}

public String getM_iName() {
return m_iName;
}
public void setM_iName(String name) {
m_iName = name;
}
public double getBalance() {
return m_dBalance;
}
public void setM_dBalance(double balance) {
m_dBalance = balance;
}
public double getInterestRate() {
return m_dInterestRate;
}
public void setInterestRate(double interestRate) {
m_dInterestRate = interestRate;
}
public void printAccountMsg(){
System.out.println("帐户："+m_iName+" 当前余额"+m_dBalance+"元 年利率毕宴为"+m_dInterestRate*100+"%");
}
public void saveMoney(double money){
m_dBalance+=money;
}
public void getMoney(double money){
if(money<=m_dBalance)
m_dBalance-=money;
else
System.out.println("对不起，您的帐余额不足！");
}
public double caculateInterest(int Days){
return m_dBalance*m_dInterestRate*Days/携亩365;
}
}

public class ExampleAccount {
public static void main(String[] args) {
BankAccount ba = new BankAccount("Andy",88888,0.01);
ba.printAccountMsg();
ba.saveMoney(1000);
ba.printAccountMsg();
ba.getMoney(10000);
ba.printAccountMsg();
System.out.println("当前利手隐银率为"+ba.getInterestRate()+" 十年后帐户余额将是："+(ba.getBalance()+ba.caculateInterest(365*10))+"元。");
ba.setInterestRate(0.02);
System.out.println("若利率为"+ba.getInterestRate()+" 十年后帐户余额将是"+(ba.getBalance()+ba.caculateInterest(365*10))+"元。");

}
}