/usr/share/applications/mimeinfo.cache has a line:
application/x-java-archive=file-roller.desktop;
and should be:
application/x-java-archive=openjdk-7-java.desktop;file-roller.desktop;
In fact, in a 12.04 LTS system with openjdk-6-java.desktop the line is:
application/x-java-archive=openjdk-6-java.desktop;file-roller.desktop;
I don't know if it is a bug or somebody decided not to permit the double-click for java files.
/usr/share/ applications/ mimeinfo. cache has a line:
application/ x-java- archive= file-roller. desktop;
and should be:
application/ x-java- archive= openjdk- 7-java. desktop; file-roller. desktop;
In fact, in a 12.04 LTS system with openjdk- 6-java. desktop the line is:
application/ x-java- archive= openjdk- 6-java. desktop; file-roller. desktop;
I don't know if it is a bug or somebody decided not to permit the double-click for java files.