The `default` method `nextDouble(double origin, double bound)` in `java.util.random.RandomGenerator` aims at generating a uniformly and spatially equidistributed random `double` in the left-closed and right-open range [`origin`, `bound`). It does so by applying the affine transform `origin + (bound - origin) * r` to a uniformly and spatially equidistributed random `double` `r` in the range [0, 1).
Since floating-point arithmetic suffers from small but noticeable rounding errors, this ends up slightly deforming the distribution of `r` when applying the affine transform. ------------- Commit messages: - 8302987: Add uniform and spatially equidistributed bounded float/double streams to RandomGenerator Changes: https://git.openjdk.org/jdk/pull/12719/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12719&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302987 Stats: 253 lines in 1 file changed: 251 ins; 1 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/12719.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12719/head:pull/12719 PR: https://git.openjdk.org/jdk/pull/12719
