JEP 238: Multi-Version JAR Files

[Paul Sandoz]

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
  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
>