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在Java中设计货币相关的业务逻辑，首先需要了解货币的基本概念和属性。以下是一个简单的示例，展示了如何创建一个表示货币的类，并实现一些基本的货币操作。
- 创建一个表示货币的类（Money）：
public class Money { private double amount; // 金额 private String currency; // 货币单位，例如：USD, CNY等 public Money(double amount, String currency) { this.amount = amount; this.currency = currency; } public double getAmount() { return amount; } public void setAmount(double amount) { this.amount = amount; } public String getCurrency() { return currency; } public void setCurrency(String currency) { this.currency = currency; } } - 为货币类添加业务逻辑方法，例如加、减、乘、除等操作：
public class Money { // ... 其他代码 // 加法操作 public Money add(Money other) { if (!this.currency.equals(other.currency)) { throw new IllegalArgumentException("Currencies do not match"); } return new Money(this.amount + other.amount, this.currency); } // 减法操作 public Money subtract(Money other) { if (!this.currency.equals(other.currency)) { throw new IllegalArgumentException("Currencies do not match"); } return new Money(this.amount - other.amount, this.currency); } // 乘法操作 public Money multiply(double multiplier) { return new Money(this.amount * multiplier, this.currency); } // 除法操作 public Money divide(double divisor) { if (divisor == 0) { throw new IllegalArgumentException("Divisor cannot be zero"); } return new Money(this.amount / divisor, this.currency); } } - 使用货币类进行业务逻辑操作：
public class Main { public static void main(String[] args) { Money money1 = new Money(10, "USD"); Money money2 = new Money(20, "USD"); Money sum = money1.add(money2); System.out.println("Sum: " + sum.getAmount() + " " + sum.getCurrency()); Money difference = money1.subtract(money2); System.out.println("Difference: " + difference.getAmount() + " " + difference.getCurrency()); Money product = money1.multiply(3); System.out.println("Product: " + product.getAmount() + " " + product.getCurrency()); Money quotient = money1.divide(2); System.out.println("Quotient: " + quotient.getAmount() + " " + quotient.getCurrency()); } } 这个示例展示了如何创建一个表示货币的类，并实现一些基本的货币操作。在实际项目中，你可能需要根据业务需求对该类进行扩展，例如添加货币转换功能、格式化输出等。
