RFR: 8378389: Remove AppContext from the Swing RepaintManager

[Phil Race]

On Sun, 22 Feb 2026 00:43:20 GMT, Phil Race <prr at openjdk.org> wrote:

> Remove AppContext from RepaintManager

src/java.desktop/share/classes/javax/swing/RepaintManager.java line 287:

> 285:      * Set the RepaintManager that should be used for the calling
> 286:      * thread. <b>aRepaintManager</b> will become the current RepaintManager
> 287:      * for the calling thread's thread group.

These words about thread group mean I have to do a CSR :-(

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PR Review Comment: https://git.openjdk.org/jdk/pull/29862#discussion_r2836896660