Openjdk 7 and 8 don't automatically open jar files

[PEIGNOT Kévin]

Hi

I made a fresh install today and discovered a bug with java. If you have a .jar file (like josm or sweethome3d) and try to open it from nautilus it doesn't works : It opens file-roller and you can't choose anything else.

I had openjdk 8 installed, but with a right click to "Open With", It wasn't proposed.
I installed openjdk 7, same problem.
I installed openjdk 6 : It worked : Openjdk 6 was proposed.

I discovered (thanks to http://askubuntu.com/questions/183086/java-not-recognized-as-default-application) that Openjdk 7 and 8 dont create .desktop files in /usr/share/applications, as Openjdk 6 do (openjdk-6-java.desktop). Here is a part of the result of 'ls /usr/share/applications' command :

[...]
onboard-settings.desktop
openjdk-6-java.desktop
openjdk-6-policytool.desktop
openjdk-7-policytool.desktop
openjdk-8-policytool.desktop
orca.desktop
[...]

I created openjdk-7-java.desktop and openjdk-8-java.desktop and openjdk-default-java.desktop files with openjdk-6-java.desktop as a model (and keeping openjdk 6 icon as 8 doesn't propose any), and used the following command to exec (just to know exactly What I did) :
- /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java -jar
- /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java -jar
- /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -jar
- /usr/bin/java -jar

By default, openjdk 6 uses /usr/bin/java -jar. That meens that the Openjdk 6 launcher doesn't launch version 6 but the default version from update-alternatives. If you don't have version 6 installed, by default you can't launch .jar files.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: desktop-file-utils 0.22-1ubuntu3
ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
Uname: Linux 3.19.0-22-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jul 14 15:14:14 2015
InstallationDate: Installed on 2015-07-14 (0 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: desktop-file-utils
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.