Problems with Java Home in VMBox

[Joe San]

Guys,

I have some trobles in getting Java Home to work on my VMBox that has Ubuntu. Following is what I have on my /etc/profile and /etc/bash.bashrc

In my bash.bashrc,

export JAVA_HOME=/opt/Softwares/jdk1.6.0_21/bin/java
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/Softwares/jdk1.6.0.21/bin

In my /etc/profile,

export JAVA_HOME=/opt/Softwares/jdk1.6.0_21/bin/java
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/Softwares/jdk1.6.0.21/bin

When I say javac on a terminal, below is what I get.

jothi@jothi-laptop:~$ javac
The program 'javac' can be found in the following packages:
 * openjdk-6-jdk
 * ecj
 * gcj-4.4-jdk
 * gcj-4.3
 * jikes-classpath
 * jikes-kaffe
 * kaffe
 * sun-java6-jdk
Try: sudo apt-get install <selected package>
javac: command not found
jothi@jothi-laptop:~$ gedit /etc/bash.bashrc
jothi@jothi-laptop:~$

I checked with my Ubuntu dual boot partition and there it seems to work fine for the same settings in /etc/profile but why not here on the VMBox?

[Jaikiran Pai]

export JAVA_HOME=/opt/Softwares/jdk1.6.0_21/bin/java
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/Softwares/jdk1.6.0.21/bin

These 2 lines contradict each other. One refers to jdk1.6.0_21 folder and the other to jdk1.6.0.21 (note the . instead of _). Looks like a typo in those files. You'll have to fix it to point to the correct location.

[Peter Johnson]

Also, JAVA_HOME should be set to the installation directory, not to the location of the java executable:

export JAVA_HOME=/opt/Softwares/jdk1.6.0_21

Then when setting the PATH, never reset it, just add the new value. Also, use the prior env vars:

export PATH=$PATH:$JAVA_HOME/bin

[Joe San]

Looks like I need to get my eyes checked. Thanks for pointing out the typo.

[Joe San]

And then the next problem: Setting Maven Home

My /etc/profile is as follows:
export JAVA_HOME=/opt/Softwares/jdk1.6.0_21/bin/java
export M2_HOME=/opt/Softwares/apache-maven-3.0  
export M2=/opt/Softwares/apache-maven-3.0/bin
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/Softwares/jdk1.6.0_21/bin:/opt/Softwares/apache-maven-3.0/bin

And this is what I get when I say mvn --version

jothi@jothi-laptop:~$ mvn --version
Error: JAVA_HOME is not defined correctly.
  We cannot execute /opt/Softwares/jdk1.6.0_21/bin/java/bin/java
jothi@jothi-laptop:~$ sudo gedit /etc/profile
jothi@jothi-laptop:~$ 

[Joe San]

Changed my Java Home like Peter mentioned above and then everything started to work fine.