RFR: 8359732: Make standard i/o encoding related system properties `StaticProperty`

[Alan Bateman]

On Tue, 17 Jun 2025 20:16:05 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> Refactored the internal handling of `stdin/out/err.encoding` to allow setting them only via command-line options by converting them into `StaticProperty`. This change prevents unexpected behavior caused by applications modifying these properties at runtime using `System.setProperty()`.

src/java.base/share/classes/module-info.java line 287:

> 285:         jdk.jpackage,
> 286:         jdk.jshell,
> 287:         jdk.net;

At some point we will need to re-visit all these qualified exports so that java.base exports as few of these internal packages as possible.

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/CLHSDB.java line 111:

> 109: 
> 110: 
> 111:         Charset charset = Charset.forName(StaticProperty.stdinEncoding(), Charset.defaultCharset());

This is the jhsdb tool, just wondering why it needs to be changed.

src/jdk.jdi/share/classes/com/sun/tools/example/debug/tty/TTY.java line 802:

> 800:         }
> 801:         try {
> 802:             Charset charset = Charset.forName(StaticProperty.stdinEncoding(), Charset.defaultCharset());

This is the example jdb debugger, I assume okay to let it read the stdin.encoding property.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25860#discussion_r2153907749
PR Review Comment: https://git.openjdk.org/jdk/pull/25860#discussion_r2153910478
PR Review Comment: https://git.openjdk.org/jdk/pull/25860#discussion_r2153913162