Arlight所以我拥有所有这些代码,我已经完成了它的相当多...基本上它只是创建一个银行帐户。我为Checking和Savings帐户制作了代码。所有这些代码都是正确的。我只需要帮助我在Testaccount
课程中创建储蓄和支票帐户的实例。
主要帐户代码:
public class Accountdrv {
public static void main (String[] args) {
Account account = new Account(1122, 20000, 4.5);
account.withdraw(2500);
account.deposit(3000);
System.out.println("Balance is " + account.getBalance());
System.out.println("Monthly interest is " +
account.getMonthlyInterest());
System.out.println("This account was created at " +
account.getDateCreated());
}
}
class Account {
private int id;
private double balance;
private double annualInterestRate;
private java.util.Date dateCreated;
public Account() {
dateCreated = new java.util.Date();
}
public Account(int id, double balance, double annualInterestRate) {
this.id = id;
this.balance = balance;
this.annualInterestRate = annualInterestRate;
dateCreated = new java.util.Date();
}
public int getId() {
return this.id;
}
public double getBalance() {
return balance;
}
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setId(int id) {
this.id =id;
}
public void setBalance(double balance) {
this.balance = balance;
}
public void setAnnualInterestRate(double annualInterestRate) {
this.annualInterestRate = annualInterestRate;
}
public double getMonthlyInterest() {
return balance * (annualInterestRate / 1200);
}
public java.util.Date getDateCreated() {
return dateCreated;
}
public void withdraw(double amount) {
balance -= amount;
}
public void deposit(double amount) {
balance += amount;
}
}
节约:
class Savings extends Account{
public Savings(int id, double balance, double annualInterestRate) {
super(id, balance, annualInterestRate);
}
public void withdraw(double amount) {
if(super.getBalance() < amount)
{
System.out.println("Error");
}
else
{
super.withdraw( amount );
System.out.println("Withdraw Completed");
}
}
}
检查:
public class Checking extends Account{
private double overdraft_limit = 100;
public Checking(int id, double balance, double annualInterestrate){
//super();
super(id, balance, annualInterestrate);
}
public void withdraw(double amount) {
if(super.getBalance() >= (amount + overdraft_limit))
{
System.out.println(" account Overdrawn");
}
else
{
super.withdraw( amount );
System.out.println("Withdraw Completed");
}
}
}
好的,这是我需要帮助的部分,它可能非常简单,但我无法解决如何写出来,我需要创建一个储蓄和检查的实例,并提取一些钱,这里是什么我做到目前为止。
Testaccount:
public class Testaccount {
public static void main(String[] args) {
Account account = new Account(0, 100, 0.6);
System.out.println(account);
account.withdraw(10.50);
System.out.println(account);
account.deposit(5.0);
System.out.println(account);
// Need to add test cases for Savings and Checking
}
}
答案 0 :(得分:0)
您是否要使用您创建的帐户实例中已有的信息?如果没有(即你想创建一个新的支票和储蓄账户,其中包含初始金额)你可以做类似
的事情Checking checking = new Checking(0,100,0.6);
checking.withdraw(50.00);
否则,如果您要使用现有的帐户实例并将其设为支票帐户并退出,请执行以下操作:
Checking checking = (Checking) account;
checking.withdraw(50.00);