如何使用BigDecimal查找小数点后的位数？

Question

I'm trying to use BigDecimals to calculate something and then round to 5 decimal places if it has more than that. How can I do this?

Would scale() work?

Answer 1

Did you already crawl through JavaDoc, especially the function precision() ?

And this here might be a direct solution which makes it needless to check the precision first:

yournumber.round(new MathContext(5, HALF_UP));

And after that use stripTrailingZeros() (thx to @GregKopff)