RFR: 8191441: (Process) add Readers and Writer access to java.lang.Process streams [v3]

[Alan Bateman]

On Mon, 24 May 2021 00:33:06 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Methods are added to java.lang.Process to read and write characters and lines from and to a spawned Process.
>> The Charset used to encode and decode characters to bytes can be specified or use the
>> operating system native encoding as is available from the "native.encoding" system property.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added throws for NPE, delegated zero-arg methods that use native.encoding to
>   the 1-arg method with a charset, added tests for Redirect cases where the streams are null-input or null-output streams.

The updated javadoc addresses most of my points. The clarification to inputReader/errorReader about malformed input looks good but we will need the equivalent in outputWriter for the unmappable character case.
I assume the "not null" can be dropped from the description of the charset parameter as NPE is now specified.

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PR: https://git.openjdk.java.net/jdk/pull/4134