round up java_java – BigDecimal.ROUND_HALF_UP和RoundingMode.HALF_UP之间的区别？
下面：
new MathContext(precision, RoundingMode.HALF_UP);
似乎工作.但是,以下内容返回错误：
new MathContext(precision, BigDecimal.ROUND_HALF_UP);
错误：
java: no suitable constructor found for MathContext(int,int)
constructor java.math.MathContext.MathContext(java.lang.String) is not applicable
(actual and formal argument lists differ in length)
constructor java.math.MathContext.MathContext(int,java.math.RoundingMode) is not applicable
(actual argument int cannot be converted to java.math.RoundingMode by method invocation conversion)
constructor java.math.MathContext.MathContext(int) is not applicable
(actual and formal argument lists differ in length)
最佳答案 请注意常量：
RoundingMode.HALF_UP
BigDecimal.ROUND_HALF_UP
根据Javadocs并根据源代码表示绝对相同：
public enum RoundingMode {
....
HALF_UP(BigDecimal.ROUND_HALF_UP),
....
}