我试图在撤消后让帐户中的余额更改,但它只是保持在10.00。我不知道如何在SavingsAccount中正确应用会改变它的方法。我试过但没有成功。
import java.util.Date;
public class Account {
private int id;
private double balance;
private double annualInterestRate;
private Date dateCreated;
private double monthlyInterestRate;
public Account() {
id = 0;
balance = 0;
annualInterestRate = 0;
}
public Account(int iD, double balancE) {
id = iD;
balance = balancE;
}
public void setID(int iD) {
id = iD;
}
public int getID() {
return (id);
}
public void setBalance(double balancE) {
balance = balancE;
}
public double getBalance() {
return (balance);
}
public void setAnnualInterestRate(double AIR) {
annualInterestRate = AIR;
}
public double getAnnualInterestRate() {
return (annualInterestRate);
}
public void setDateCreated(Date dateCreated) {
this.dateCreated = dateCreated;
}
public double getMonthlyInterestRate() {
return ((annualInterestRate / 100) / 12);
}
public double getMonthlyInterest() {
return (balance * monthlyInterestRate);
}
public void withdraw(double ammount) {
balance = balance - ammount;
}
public void deposit(double ammount) {
balance = balance + ammount;
}
}
public class SavingsAccount extends Account {
public SavingsAccount(int iD, double balancE) {
super(iD, balancE);
}
@Override
public void withdraw(double amount) {
if (amount > getBalance()) {
System.out.println("Current Balance: " + getBalance()
+ "\nThe withdrawal cannot be made due to insufficient funds.");
}
}
}
public class Test extends Account {
public static void main(String[] args) {
SavingsAccount a1 = new SavingsAccount(1122, 10.00);
a1.withdraw(5.00);
a1.deposit(00.00);
a1.setAnnualInterestRate(4.5);
Date dat = new Date();
System.out.println("Balance: " + a1.getBalance() +
"\nMonthly Interest: " + a1.getMonthlyInterest() +
"\nDate Created: " + dat);
}
}
答案 0 :(得分:2)
尝试:
public void deposit(double ammount) {
balance = balance + ammount;
setBalance(balance);
}
你应该在撤回和平衡结束时调用setBalance,并传入新的余额。
答案 1 :(得分:1)
在withdraw()
中,您只检查提款金额大于余额的条件,然后打印信息。您还必须处理合法金额退出的情况。
@Override
public void withdraw(double amount) {
if (amount > getBalance()) {
System.out.println("Current Balance: " + getBalance()
+ "\nThe withdrawal cannot be made due to insufficient funds.");
} else {
super.withdraw(amount);
}
}
答案 2 :(得分:0)
您必须在public void withdraw
方法中使用setBalance方法。像这样:
public void withdraw(double amount) {
if (amount > getBalance()) {
System.out.println("Current Balance: " + getBalance() + "\nThewithdrawal cannot be made due to insufficient funds.");
}
else
{
setBalance(getBalance() - amount);
}
现在它会为您的balance
变量设置新值,因为如果您退出,您的帐户中将有balance-amount
个。
我希望它会对你有所帮助!