java MonetaryConversions 为高位货币抛出 ArithmeticException

Question

我想使用标准 java MonetaryConversions 来转换货币。

乍一看它很好用而且简单:

    @Test
    public void testConversion()
    {
        FastMoney usd = FastMoney.of(1000, Monetary.getCurrency("USD"));
        usd.with(MonetaryConversions.getConversion("EUR"));
    }

然而，当我使用具有高面值的货币（如日元或墨西哥比索）时，我发现它会抛出 ArithmeticExceptions

    @Test
    public void testArithmeticException()
    {
        FastMoney jpy = FastMoney.of(1000, Monetary.getCurrency("JPY"));
        jpy.with(MonetaryConversions.getConversion("EUR"));
    }

抛出以下异常

java.lang.ArithmeticException: 0.0082769 can not be represented by this class, scale > 5

    at org.javamoney.moneta.FastMoney.getInternalNumber(FastMoney.java:197)
    at org.javamoney.moneta.FastMoney.multiply(FastMoney.java:388)
    at org.javamoney.moneta.FastMoney.multiply(FastMoney.java:84)
    at org.javamoney.moneta.spi.AbstractCurrencyConversion.apply(AbstractCurrencyConversion.java:118)
    at org.javamoney.moneta.FastMoney.with(FastMoney.java:594)
    at tech....GatewayTransactionConverterTest.testArithmeticException(GatewayTransactionConverterTest.java:207)

检查 FastMoney 的代码，我发现异常是硬编码的，我找不到任何可以减少的地方，例如规模。

但是 java 提供的开箱即用的转换非常无用，因为我无法转换很多货币。我无法想象没有人有这个问题。但是我找不到 google.

的任何内容

Answer 1

作为

Can you use the bigdecimal-based Money class?The FastMoney class is based on longs, which you shouldn't rely on for high precision currency calculations.

这对我有用。

java MonetaryConversions 为高位货币抛出 ArithmeticException

java MonetaryConversions throws ArithmeticException for high digit currencies

java

currency

arithmeticexception

java-money