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I'm running Pangolin (12.04 LTS) and want to sort out some Java stuff where my JVM is pointing at a different place to my Compiler.

To demonstrate, my JVM is as follows:

pcrow@pcrow-HP-notebook:~/Documents$ java -version
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.12.04.4)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

Whereas my Compiler points here:

pcrow@pcrow-HP-notebook:~/Documents$ javac -version
javac 1.7.0_51

I have configured the latter through adding an entry to my ~/.profile file. The thing is that I'm not sure what sets the former and I want them to be consistent. In '/etc/environment' I have the following entry:


And when I run printenv | grep "java"


Can you tell me where IcedTea6 is most likely set up on Ubuntu? I'd like to override it if I can and make sure my JVM and Compiler are both using the same version.

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What is the output of which java and which javac? –  Aaron Feb 13 '14 at 19:17
each command points to /usr/bin/java and /usr/bin/javac respectively and I subsequently see that those locations are specified in the PATH variable as it is specified in /etc/environment –  Philip Crow Feb 14 '14 at 1:30

1 Answer 1

My PATH is in some way influenced by the file /etc/environment as you can see:


When I execute which java and which javac I see something like follows:


Now, I can't be sure the two are related.* but as a Java dev I'm often adding things to Path - it's how we influence CLASSPATH so that our Java classes are available. And in the Path configuration above you see this excerpt:


I don't know what that means. Nevertheless by following the targets given to me by the which command I come to a set of links to executables. Looking at the targets of those links I get something like:


Unsure on next steps. Copy those links, back them up or remove them. A bit of trial and error and Googling are the next steps. I haven't googled the difference between javac -version and which but I should

HTH and thanks to BryceAtNetwork23

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