问题
I am trying to decide which data type shall i use for a financial application.
I have read that Double or BigDecimal should be used. And i am confused between them.
Any help in this regard will be highly appreciated
回答1:
You almost certainly don't want to use floating-point types (double, float, Double, Float) to handle monetary amounts, especially if you will be performing computations on them. The main reason for this is that there are many simple-looking numbers that cannot be represented exactly as a double et al. One such number is 0.1.
BigDecimal is therefore a much better choice for this use case.
回答2:
Use BigDecimal, it's a lot better than Double for financial stuff. See here the accepted answer for a similar question: Double vs. BigDecimal?
回答3:
For most applications, a simple long will do: when representing cents, this will handle amounts up to 10^17 {Dollars, Euros, whatever}.
回答4:
BigDecimal isn't only best choice, BigDecimal is designed for such case.
来源：https://stackoverflow.com/questions/15865012/which-data-type-to-use-for-manipulating-currency