RFR: 7030853: JDK 7 Serializable Swing classes not compatible with JDK 6

[Sergey Bylokhov]

On Wed, 7 Dec 2022 16:35:24 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> The serialized form of the following classes in JDK 7 builds are not compatible with prior versions of Java:
>     javax.swing.text.html.parser.ParserDelegator
>     javax.swing.LayoutComparator
> They need to be declared as not compatible between releases in the API documentation, as is the case for some other serializable Swing classes.
> 
> Since It is widely known that serialized Swing classes are not comptible between major releases, we just didn't add the warning at that couple classes.
> Added the warning..

I think we will need a CSR for this change.  What people think about adding this note to the documentation of the swing package?

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PR: https://git.openjdk.org/jdk/pull/11565