Java 具有存款和取款功能的银行账户类别

本简介旨在创建一个账户对象，ID为1122，余额为20000英镑，年利率为4.5%，使用2500英镑的提款法和3000英镑的存款法，以及打印余额、月利息和账户创建日期

我已经写了下面的代码，但在主要方法中，初始余额是错误的，应该是20000英镑，而不是20500英镑，取款和存款也是错误的。提取金额应为17500英镑，存款金额应为20500英镑。有什么建议可以让你喜欢这个吗

package Account;
import java.util.Date;

class Account {
private int id;
private double balance; //balance for account
private double annualInterestRate; //store interest rate
private Date dateCreated; //store date account created

// no arg constructor for default account 
Account() {
    id = 0;
    balance = 0.0;
    annualInterestRate = 0.0;
}
//constructor with specfic id and initial balance
Account (int newId, double newBalance) {
id = newId;
balance = newBalance;
}
//
Account (int newId, double newBalance, double newAnnualInterestRate) {
    id = newId;
    balance = newBalance;
    annualInterestRate = newAnnualInterestRate;
}
//accessor and mutator methods
public int getId() {
    return id;
}
public double getBalance() {
    return balance;
}
public double getAnnualInterestRate() {
    return annualInterestRate;
}
public void setId (int newId) { 
    id = newId;
}
public void setBalance (double newBalance) {
    balance = newBalance;
}
public void setAnnualInterestRate (double newAnnualInterestRate) {
    annualInterestRate = newAnnualInterestRate;
}
public void seDateCreated (Date newDateCreated) { 
    dateCreated = newDateCreated;
}
//Method for monthly interest
double getMonthlyInterestRate() {
    return annualInterestRate/12;
}
//Define method withdraw
double withdraw (double amount) {  
    return balance -= amount;
}
//Define method deposit 
double deposit(double amount) {
    return balance += amount;
}

    public static void main(String[] args) {
        java.util.Date dateCreated = new java.util.Date();
        Account account1 = new Account (1122, 20000, 0.045); //
        //account1.withdraw(2500);
        //account1.deposit(3000);
        System.out.println("----------------------------------------");
        System.out.println("   Welcome to your online account!");
        System.out.println("Please find your account details below");
        System.out.println("----------------------------------------");

        System.out.println("Account ID:" + " " + account1.id);
        System.out.println("Initial Balance:" + account1.getBalance());

        System.out.println("Balance after Withdraw:" + " " + account1.withdraw(2500));
        System.out.println("Balance after deposit" + " " + account1.deposit(3000));


        System.out.println("Interest Rate:" + " " + account1.getAnnualInterestRate());

        System.out.println("Monthly Interest:" + " " + "£" + account1.getMonthlyInterestRate());


        System.out.println("Date Account was Created:" + " " + dateCreated);



        System.out.println("------------------------");
        System.out.println("The Process is complete");
        System.out.println("------------------------");
    }

}

---

您需要注释掉/删除以下行：

  public static void main(String[] args) {
        java.util.Date dateCreated = new java.util.Date();
        Account account1 = new Account (1122, 20000, 0.045); //
        //account1.withdraw(2500);
        //account1.deposit(3000);

---

您调用取款/存款两次（稍后在打印对账单中再次调用）。

您需要注释掉/删除以下行：

  public static void main(String[] args) {
        java.util.Date dateCreated = new java.util.Date();
        Account account1 = new Account (1122, 20000, 0.045); //
        //account1.withdraw(2500);
        //account1.deposit(3000);

---

您调用取款/存款两次（稍后在打印对账单中再调用一次）。

这真的有效吗？例如

“初始余额：”+account1.getBalance

不调用

getBalance

函数。我是编程新手，对自己做错的事情有点困惑。它返回20500英镑，而不是20000英镑的实际初始余额。您调用account1。提取（2500）；和账户1.存款（3000）；twice@Someprogrammerdude这意味着您的程序将不会使用

.getBalance

进行编译-可能是一个输入错误，我想您的意思是

。getBalance（）

这真的可以编译吗？例如

“初始余额：”+account1.getBalance

不调用

getBalance

函数。我是编程新手，对自己做错的事情有点困惑。它返回20500英镑，而不是20000英镑的实际初始余额。您调用account1。提取（2500）；和账户1.存款（3000）；twice@Someprogrammerdude意味着您的程序将不会使用

.getBalance

进行编译-可能是输入错误，我想您的意思是

.getBalance（）