1.) ~# java -version
bash: java: command not found

2.) ~# which java
(nothing happens I get a blank ~# again)

3.) click on file /usr/bin/java and get an error:

Unable to run the command specified. The file or directory file:/usr/local/j2re1.4.1/bin/.java_wrapper does not exist.

It appears java has dissappeared, should I re-install.
I'm using the Blackburn version of j2re-1.4.1

Cheers!!