Java复制构造函数银行帐户问题

在我的学校开始深入学习Java，我终于撞上了我的墙，我不知道我哪里出错了。我将列出4个类，一个是AccountDriver或main方法，BankAccount，CheckingAccount和SavingsAccount派生的父类。现在我的问题是储蓄账户。这是代码

账户驱动程序

//Demonstrates the BankAccount and derived classes

import java.text.*;         // to use Decimal Format

public class AccountDriver
{
public static void main(String[] args)
{
    double put_in = 500;
    double take_out = 1000;

    DecimalFormat myFormat;
    String money;
    String money_in;
    String money_out;
    boolean completed;

    // to get 2 decimals every time
    myFormat = new DecimalFormat("#.00");

    //to test the Checking Account class
    CheckingAccount myCheckingAccount =
            new CheckingAccount ("Benjamin Franklin", 1000);
    System.out.println ("Account Number "
        + myCheckingAccount.getAccountNumber() +
        " belonging to " + myCheckingAccount.getOwner());
    money  = myFormat.format(myCheckingAccount.getBalance());
    System.out.println ("Initial balance = $" + money);
    myCheckingAccount.deposit (put_in);
    money_in = myFormat.format(put_in);
    money  = myFormat.format(myCheckingAccount.getBalance());
    System.out.println ("After deposit of $" + money_in
        + ",  balance = $" + money);
    completed = myCheckingAccount.withdraw(take_out);
    money_out = myFormat.format(take_out);
    money  = myFormat.format(myCheckingAccount.getBalance());
    if (completed)
    {
        System.out.println ("After withdrawal of $" + money_out
                + ",  balance = $" + money);
    }
    else
    {
        System.out.println ("Insuffient funds to withdraw $"
                + money_out + ",  balance = $" + money);
    }
    System.out.println();

    //to test the savings account class
    SavingsAccount yourAccount =
            new SavingsAccount ("William Shakespeare", 400);
    System.out.println ("Account Number "
            + yourAccount.getAccountNumber() +
            " belonging to " + yourAccount.getOwner());
    money  = myFormat.format(yourAccount.getBalance());
    System.out.println ("Initial balance = $" + money);
    yourAccount.deposit (put_in);
    money_in = myFormat.format(put_in);
    money  = myFormat.format(yourAccount.getBalance());
    System.out.println ("After deposit of $" + money_in
            + ",  balance = $" + money);
    completed = yourAccount.withdraw(take_out);
    money_out = myFormat.format(take_out);
    money  = myFormat.format(yourAccount.getBalance());
    if (completed)
    {
        System.out.println ("After withdrawal of $" + money_out
            + ",  balance = $" + money);
    }
    else
    {
        System.out.println ("Insuffient funds to withdraw $"
            + money_out + ",  balance = $" + money);
    }
    yourAccount.postInterest();
    money  = myFormat.format(yourAccount.getBalance());
    System.out.println ("After monthly interest has been posted,"
            + "balance = $" + money);
    System.out.println();


    // to test the copy constructor of the savings account class
    SavingsAccount secondAccount =
            new SavingsAccount (yourAccount,5);
    System.out.println ("Account Number "
            + secondAccount.getAccountNumber()+
            " belonging to " + secondAccount.getOwner());
    money  = myFormat.format(secondAccount.getBalance());
    System.out.println ("Initial balance = $" + money);
    secondAccount.deposit (put_in);
    money_in = myFormat.format(put_in);
    money  = myFormat.format(secondAccount.getBalance());
    System.out.println ("After deposit of $" + money_in
            + ", balance = $" + money);
    secondAccount.withdraw(take_out);
    money_out = myFormat.format(take_out);
    money  = myFormat.format(secondAccount.getBalance());
    if (completed)
    {
        System.out.println ("After withdrawal of $" + money_out
                + ",  balance = $" + money);
    }
    else
    {
        System.out.println ("Insuffient funds to withdraw $"
                + money_out + ",  balance = $" + money);
    }
    System.out.println();

    //to test to make sure new accounts are numbered correctly
    CheckingAccount yourCheckingAccount =
            new CheckingAccount ("Issac Newton", 5000);
    System.out.println ("Account Number "
            + yourCheckingAccount.getAccountNumber()
            + " belonging to "
            + yourCheckingAccount.getOwner());

}
}

银行账户（父类）

最后是储蓄账户

public class SavingsAccount extends BankAccount{

double rate = .025;

static int savingsNumber = 0;

private String accountNumber = super.getAccountNumber();


//Default constructor
public SavingsAccount(String name, double amount){

    super(name, amount);

    accountNumber = accountNumber + "-" + Integer.toString(savingsNumber);

}


//Copy constructor
public SavingsAccount(SavingsAccount oldAccount, double amount)
{           

    savingsNumber++;

    accountNumber = oldAccount.accountNumber + Integer.toString(savingsNumber);
}


public void postInterest(){
    double interestAmount = getBalance() * .025/12;

    double finalAmount = getBalance() + interestAmount;

    setBalance(finalAmount);
}


public String getAccountNumber()
{
    return accountNumber;
}

}

这是AccountDriver运行时的输出

Account Number 100001-10 belonging to Benjamin Franklin
Initial balance = $1000.00
After deposit of $500.00,  balance = $1500.00
After withdrawal of $1000.00,  balance = $499.85

Account Number 100002-0 belonging to William Shakespeare
Initial balance = $400.00
After deposit of $500.00,  balance = $900.00
Insuffient funds to withdraw $1000.00,  balance = $900.00
After monthly interest has been posted,balance = $901.88

Account Number 100002-01 belonging to null  **Should be 10002-1 and William Shakespeare**
Initial balance = $.00                      **Should be $5.00**
After deposit of $500.00, balance = $500.00 **Should be changed in accordance with an initial balance of $5.00
Insuffient funds to withdraw $1000.00,  balance = $500.00 **"   "**

Account Number 100004-10 belonging to Issac Newton **Should be # 10003-10

---

所以我的问题都列在星号上，我花了2个小时尝试不同的方法，要么得到相同的结果，要么得到更差的结果。希望有人能指出我错在哪里。谢谢大家。

所有者是BankAccount类别的成员。您还必须在副本中设置所有者成员。其他成员也是如此

  //Copy constructor
public SavingsAccount(SavingsAccount oldAccount, double amount)
{           

    savingsNumber++;

    accountNumber = oldAccount.accountNumber + Integer.toString(savingsNumber);
    owner = oldAccount.getOwner();
    balance = oldAccount.getBalance();
    //...

}

---

所有者是BankAccount类的成员。您还必须在副本中设置所有者成员。其他成员也是如此

  //Copy constructor
public SavingsAccount(SavingsAccount oldAccount, double amount)
{           

    savingsNumber++;

    accountNumber = oldAccount.accountNumber + Integer.toString(savingsNumber);
    owner = oldAccount.getOwner();
    balance = oldAccount.getBalance();
    //...

}

---

在复制构造函数中，应初始化传递的

SavingsAccount

实例中的所有成员，如：

//Copy constructor

public SavingsAccount(SavingsAccount oldAccount, double amount)
{           
    super(oldAccount,amount);  //  <--- SUPER COPY CONSTRUCTOR CALLED
    savingsNumber++;
    accountNumber = oldAccount.accountNumber + Integer.toString(savingsNumber);
}

//复制构造函数
公共储蓄账户（储蓄账户旧账户，双倍金额）
{           
super（oldcount，amount）；//在复制构造函数中，您应该初始化传递的
SavingsAccount
实例中的所有成员，如下所示：

//Copy constructor

public SavingsAccount(SavingsAccount oldAccount, double amount)
{           
    super(oldAccount,amount);  //  <--- SUPER COPY CONSTRUCTOR CALLED
    savingsNumber++;
    accountNumber = oldAccount.accountNumber + Integer.toString(savingsNumber);
}

//复制构造函数
公共储蓄账户（储蓄账户旧账户，双倍金额）
{           
super（oldcount，amount）；//尝试在所有者和余额上显示“BankAccount.owner/balance不可见”时出错。您应该在基类中为成员引入公共setter或使成员受保护。尝试这样做会在所有者和余额上显示错误“BankAccount.owner/balance不可见”您应该为基类中的成员引入公共setter，或者使该成员受到保护。