java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result
Scene description
An exception occurred while writing a JAVA program today: java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
The statement that found the error was:
buyMoney.divide(tradeMoney）
Solution
It turns out that if BigDecimal is used for division in JAVA, the second parameter must be passed in the divide method, and the definition is accurate to a few decimal places. Otherwise, if the result is an infinite loop decimal, the above will be thrown. abnormal.
buyMoney.divide(tradeMoney,2, BigDecimal.ROUND_HALF_UP)
Source code
Note that the divide method of BigDecimal has two overloaded methods, one is to pass two parameters, the other is to pass three parameters:
Two-parameter method:
@param divisor value by which this {@code BigDecimal} is to be divided. 传入除数
@param roundingMode rounding mode to apply. Incoming round mode
Three parameter method:
@param divisor value by which this {@code BigDecimal} is to be divided.
@param scale scale of the {@code BigDecimal} quotient to be returned.
@param roundingMode rounding mode to apply. Rounding in Pattern of
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