定义Account类 属性: private int balance 方法: getter方法 void deposit(int money) //存钱,在余额的基础上加上money void withdraw(int money) //取钱,在余额的基础上减去money 注意:可能有多个线程通过deposit或withdraw方法同时存取Account对象的balance属性。
时间: 2024-02-06 14:09:59 浏览: 103
以下是Account类的定义:
```
public class Account {
private int balance;
public synchronized int getBalance() {
return balance;
}
public synchronized void deposit(int money) {
balance += money;
}
public synchronized void withdraw(int money) {
balance -= money;
}
}
```
在这个实现中,我们使用了 synchronized 关键字来保证多个线程同时访问 Account 对象的时候,不会出现竞态条件。因为 synchronized 关键字可以保证同一时刻只有一个线程可以进入到被 synchronized 保护的代码块中执行,从而避免了多个线程同时修改 balance 属性带来的问题。同时,我们在 getter 和 setter 方法上都使用了 synchronized 关键字,保证了在执行这些方法时,balance 属性的值是正确的。
相关问题
用java语言写一个名为Account的类模拟账户。该类的属性和方法如下图所示。该类包括的属性:账号id,余额balance,年利率annualInterestRate;包含的方法:访问器方法(getter和setter方法),取款方法withdraw(),存款方法deposit()。
好的,以下是用Java语言编写的Account类的代码:
```
public class Account {
private int id;
private double balance;
private double annualInterestRate;
public Account(int id, double balance, double annualInterestRate) {
this.id = id;
this.balance = balance;
this.annualInterestRate = annualInterestRate;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setAnnualInterestRate(double annualInterestRate) {
this.annualInterestRate = annualInterestRate;
}
public void withdraw(double amount) {
if (balance >= amount) {
balance -= amount;
System.out.println("成功取出" + amount + "元,当前余额为" + balance + "元。");
} else {
System
写一个名为Account的类模拟账户。该类的属性和方法如下图所示。该类包括的属性:账号id,余额balance,年利率annualInterestRate;包含的方法:访问器方法(getter和setter方法),返回月利率的方法getMonthlyInterest(),取款方法withdraw(),存款方法deposit Java代码
以下是使用Java语言实现的`Account`类的代码示例:
```java
class Account {
private int accountId;
private double balance;
private double annualInterestRate;
public Account(int accountId, double balance, double annualInterestRate) {
this.accountId = accountId;
this.balance = balance;
this.annualInterestRate = annualInterestRate;
}
public int getAccountId() {
return accountId;
}
public void setAccountId(int accountId) {
this.accountId = accountId;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setAnnualInterestRate(double annualInterestRate) {
this.annualInterestRate = annualInterestRate;
}
public double getMonthlyInterest() {
return balance * (annualInterestRate / 12);
}
public void withdraw(double amount) {
if (amount <= balance) {
balance -= amount;
System.out.println("成功取出:" + amount + "元");
} else {
System.out.println("余额不足,取款失败");
}
}
public void deposit(double amount) {
balance += amount;
System.out.println("成功存入:" + amount + "元");
}
}
public class Main {
public static void main(String[] args) {
Account account = new Account(123456, 1000.0, 0.05);
System.out.println("账户ID:" + account.getAccountId());
System.out.println("当前余额:" + account.getBalance());
System.out.println("月利率:" + account.getMonthlyInterest());
account.withdraw(500);
System.out.println("当前余额:" + account.getBalance());
account.deposit(200);
System.out.println("当前余额:" + account.getBalance());
}
}
```
以上代码定义了一个`Account`类,包括账号ID、余额和年利率等属性。该类提供了相应的访问器方法(getter和setter方法)以及返回月利率、取款和存款等方法。
在`Main`类的`main`方法中,创建了一个`Account`对象,并通过访问器方法获取和设置属性值。然后调用取款和存款方法来模拟账户的操作,并输出相应的结果。
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