java银行账户管理系统在已有的简单银行账户管理系统(控制台程序)基础上,设计: 1 派生类SavingsAccount(储蓄账户):在原有账户类的基础上增加利息计算; 2 派生类CreditCardAccount类(信用卡账户):在原有账户类的基础上增加透支功能;
时间: 2024-10-16 21:12:33 浏览: 61
在Java中设计银行账户管理系统时,首先创建一个基础的`Account`类作为抽象类或接口,包含了基本的账户属性(如账号、余额等)以及通用的操作方法,比如存款、取款、查询余额等。这个`Account`类可以如下定义:
```java
abstract class Account {
private String accountNumber;
private double balance;
public Account(String accountNumber) {
this.accountNumber = accountNumber;
}
// 其他通用方法...
public abstract void deposit(double amount);
public abstract void withdraw(double amount);
public abstract double getBalance();
}
```
接着,为了满足特定需求,我们创建两个派生类:
1. `SavingsAccount`类,它继承自`Account`并实现了额外的利息计算功能:
```java
class SavingsAccount extends Account {
private double interestRate; // 利率
public SavingsAccount(String accountNumber, double initialBalance, double interestRate) {
super(accountNumber);
this.balance = initialBalance;
this.interestRate = interestRate;
}
@Override
public void deposit(double amount) {
// 存款逻辑...
super.deposit(amount); // 调用父类方法
}
@Override
public void withdraw(double amount) {
// 提款逻辑...
if (amount <= getBalance()) {
super.withdraw(amount);
} else {
System.out.println("Insufficient funds for withdrawal.");
}
}
// 计算利息
public void calculateInterest() {
double interest = balance * interestRate * getInterestPeriod();
balance += interest;
}
// ...其他方法...
}
```
2. `CreditCardAccount`类,同样继承自`Account`,增加了透支功能:
```java
class CreditCardAccount extends Account {
private int creditLimit;
public CreditCardAccount(String accountNumber, double initialBalance, int creditLimit) {
super(accountNumber);
this.balance = initialBalance;
this.creditLimit = creditLimit;
}
// 具体的透支逻辑
@Override
public void withdraw(double amount) {
if (amount <= getBalance() + availableCredit()) {
super.withdraw(amount);
} else {
System.out.println("Exceeded your credit limit.");
}
}
// 计算可用信用额度
private double availableCredit() {
return Math.max(0, creditLimit - getBalance());
}
// ...其他信用卡特有的方法...
}
```
在实际应用中,用户可以根据需要选择`SavingsAccount`或`CreditCardAccount`实例,并通过它们提供的方法进行操作。
阅读全文