RFR: 8361216: Do not fork javac in J2DBench ant build

[Eric Caspole]

On Fri, 4 Jul 2025 00:59:01 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>>> I think we can just drop ant and leave the makefile as it is. The source/target settings are set to that low level to indicate that the source code should be compatible with older versions of the JDK. Currently, JDK 1.4 compatibility is still maintained.
>> 
>> I have supposed that this PR exists because Eric wants to use ant. Eric ?
>> 
>> I think for today's mainline, not supporting jdk7 as an out of the box target isn't a huge problem. 
>> Current javac doesn't support 7 as a target so it seems reasonable to me.
>
>> Current javac doesn't support 7 as a target so it seems reasonable to me.
> 
> That's why the makefile was parameterized, to easily set the target and source options based on the currently used minimal supported version of javac. But we may change it with a comment that 1.4 still should be supported, or something like that.

Yes when I need to work on J2DBench I usually use the ant and nbproject because I still often use NetBeans.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26077#discussion_r2195313649