RFR: 8305457: Implement java.io.IO

[Chen Liang]

On Mon, 6 May 2024 21:45:12 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> Please review this PR which introduces the `java.io.IO` top-level class and three methods to `java.io.Console` for [Implicitly Declared Classes and Instance Main Methods (Third Preview)].
> 
> This PR has been obtained as `git merge --squash` of a now obsolete [draft PR].
> 
> [Implicitly Declared Classes and Instance Main Methods (Third Preview)]: https://bugs.openjdk.org/browse/JDK-8323335
> [draft PR]: https://github.com/openjdk/jdk/pull/18921

src/java.base/share/classes/java/io/IO.java line 41:

> 39:  */
> 40: @PreviewFeature(feature = PreviewFeature.Feature.IMPLICIT_CLASSES)
> 41: public class IO {

Should this be final?

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PR Review Comment: https://git.openjdk.org/jdk/pull/19112#discussion_r1591707684