JEP 238: Multi-Version JAR Files

[Paul Sandoz]

On Feb 26, 2015, at 5:02 PM, Paul Sandoz <paul.sandoz at oracle.com> wrote:

> Hi,
> 
> If anyone wants to give this a test drive see stuff in here:
> 
>  http://cr.openjdk.java.net/~psandoz/multiversion-jar/
> 
> produced by Steve (CC'ed) who has done all the development.
> 
> For example:
> 
>  multiversion-jar $ java -version
>  java version "1.7.0_72"
>  Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
>  Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)
>  multiversion-jar $ 
>  multiversion-jar $ java -jar version.jar 
>  I am running on version 7
> 
> 
>  multiversion-jar $ java -jar version.jar 
>  I am running on version 7

The above two lines should be:

  multiversion-jar $ java -version
  java version "1.8.0"
  Java(TM) SE Runtime Environment (build 1.8.0-b132)
  Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)


>  multiversion-jar $ 
>  multiversion-jar $ java -jar version.jar 
>  I am running on version 7
>  multiversion-jar $ 
>  multiversion-jar $ java -Xbootclasspath/p:URLClassPath.jar -jar version.jar 
>  I am running on version 8
> 
> 
>  multiversion-jar $ java -version
>  java version "1.9.0-internal"
>  Java(TM) SE Runtime Environment (build 1.9.0-internal-sandoz_2015_01_26_16_48-b00)
>  Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-internal-sandoz_2015_01_26_16_48-b00, mixed mode)
>  multiversion-jar $ 
>  multiversion-jar $ java -jar version.jar 
>  I am running on version 7
>  multiversion-jar $ 
>  multiversion-jar $ java -Xbootclasspath/p:URLClassPath.jar -jar version.jar 
>  I am running on version 9
> 
> Paul.
> 
> On Feb 12, 2015, at 9:52 PM, Paul Sandoz <Paul.Sandoz at oracle.com> wrote:
> 
>> Hi
>> 
>> In connection with the JEP there is also a design document to help the discussion:
>> 
>> http://cr.openjdk.java.net/~psandoz/jdk9/MultiVersionJar-8u60-9-design.md
>> 
>> We are especially interesting in hearing feedback from library developers, tool/IDE developers, and anyone doing funky stuff with class loading and JAR files.
>> 
>> Paul.
>> 
>> On Feb 12, 2015, at 9:41 PM, mark.reinhold at oracle.com wrote:
>> 
>>> New JEP Candidate: http://openjdk.java.net/jeps/238
>>> 
>>> - Mark
>> 
>