On Thu, 4 Mar 2021 12:16:29 GMT, Сергей Цыпанов
<github.com+10835776+stsypa...@openjdk.org> wrote:
> When we do
> byte b1 = (byte) (value & 0xFF);
> we keep from int only 1 lower byte and exactly the same can be achieved with
> plain cast. See the test below:
> public class Main {
> public static void main(String[] args) throws Exception {
> IntStream.range(Integer.MIN_VALUE, Integer.MAX_VALUE).forEach(value -> {
> byte b1 = (byte) (value & 0xFF);
> byte b2 = (byte) value;
> if (b1 != b2) {
> throw new RuntimeException("" + value);
> }
> });
> }
>
> Also tier1 and tier2 are both OK.
I don't think these masks have been added because they are _required_ but
rather because they explicitly show the intention: You can immediately see that
losing the MSBs of an int during the cast is _not_ just an error.
-------------
PR: https://git.openjdk.java.net/jdk/pull/2826
