On Wed, 19 Jun 2024 14:22:38 GMT, Raffaello Giulietti <rgiulie...@openjdk.org> wrote:
> Take the `double` closest to the exact decimal 0.1. > > My understanding is that IEEE with a precision of 17 would convert it to the > decimal 0.10000000000000001. > > However, `Formatter` with a specifier `"%.17f"` will render this as > 0.10000000000000000. That's because `Formatter`'s spec is based on this > method (which produces 0.1), so cannot generate the trailing 1. > > Similarly, the `double` closest to 1.2 is converted to 1.19999999999999996 by > IEEE and to 1.20000000000000000 by `Formatter`, because this method produces > 1.2. > > In other words, neither this method nor the functionality offered by > `Formatter` and friends correspond to IEEE, at least not in full. Updated to use a conversion through BigDecimal. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19590#discussion_r1676965169
