RFR: 8364361: [process] java.lang.Process should implement close and be AutoCloseable

[David Holmes]

On Tue, 5 Aug 2025 18:21:24 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> The teardown of a Process launched by `ProcessBuilder` includes the closing of streams and ensuring the termination of the process is the responsibility of the caller. The `Process.close()` method provides a clear and obvious way to ensure all the streams are closed and the process terminated.
> 
> The try-with-resources statement is frequently used to open streams and ensure they are closed on exiting the block. By implementing `AutoClosable.close()` the completeness of closing the streams and process termination can be done by try-with-resources.
> 
> The actions of the `close()` method are to close each stream and destroy the process if it has not terminated.

src/java.base/share/classes/java/lang/Process.java line 631:

> 629:      * Streams should be {@code closed} when no longer needed.
> 630:      * Closing an already closed stream usually has no effect but is specific to the stream.
> 631:      * IOExceptions that occur when closing streams are ignored.

Suggestion:

     * Any {@code IOException} that occurs when closing a stream is ignored.

src/java.base/share/classes/java/lang/Process.java line 635:

> 633:      * The process may already have exited or be in the process of exiting;
> 634:      * if it is {@linkplain #isAlive() alive}, it is {@linkplain #destroy destroyed}.
> 635:      * IOExceptions that occur when destroying the process are ignored.

Suggestion:

     * Any {@code IOException} that occurs when destroying the process is ignored.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26649#discussion_r2255930745
PR Review Comment: https://git.openjdk.org/jdk/pull/26649#discussion_r2255931623