[Bug 289858] Mk/Uses/java.mk: Use JAVA_VERSION as priority

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289858

--- Comment #8 from Ronald Klop <ronald@FreeBSD.org> ---
Created attachment 268599
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268599&action=edit
git diff to reverse the order of preferred java version

Hi,

I experimented a bit and came up with this patch. It prefers the highest
version in the JAVA_VERSION list instead of the lowest version.

The effect is like this:
1. no JAVA_VERSION set, prefer JAVA_DEFAULT (21)
2. JAVA_VERSION=8 11, prefer 11
3. JAVA_VERSION=17+, prefer 25 (latest)

Option 1 is stable, needs exp-run to increase.
Option 2 is conservative and predictive.
Option 3 will be more progressive when a new JDK is added to the tree.

Frequency table of JAVA_VERSION in ports with USES=java:
 292  
  12  11
   1  11 17
  37  11+
  16  17
  28  17+
   4  21
   1  21 17
   1  21 17 25
  28  21+
   1  22
   1  24
  48  8
   7  8 11
   3  8 11 17
   1  8 11 17 18
   1  8 11 17 18 19 20
   1  8+

I'm currently building all USES=java ports with this patch.

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