use different java version to run two programs
There's no point in having them both in $PATH
because only one will get used. You could symlink one to a different name -- e.g. java6
-- I've never tried this w/ java and not sure if it would work.
The best way to do this would be to install one of them (presumably 1.6) in a location like /opt/java6
, leaving 1.7 as the default. Then when you want to use 6:
export PATH=/opt/java6/bin:$PATH
And start it from the command line. You could also put all that together in a script. Don't try to run Cassandra from the same shell after that unless you remove that from $PATH
(easy way to check is echo $PATH
).
To automate this for one specific application:
#!/bin/sh
export PATH=/opt/java6/bin:$PATH
exec /path/to/application
You can then put that somewhere in the regular $PATH
(e.g., /usr/local/bin
), make sure it is executable (chmod 755 whatever.sh
) and start the application that way. It will then not affect $PATH
in the process which launches it.