设置JAVA_HOME并在Ubuntu中查找Maven版本

Question

I want to run my maven project in eclipse through command prompt, however I have successfully run it in eclipse. In search for that, I found the need to set JAVA_HOME variable and find the maven version. So I did

echo $JAVA_HOME
/usr/lib/jvm/java-7-openjdk-amd64/bin


mvn --version
Error: JAVA_HOME is not defined correctly.
We cannot execute /usr/lib/jvm/java-7-openjdk-amd64/bin/bin/java  //different from above path.. Is it ok ?

I have this in my .bashrc

PATH=$PATH:$HOME/.rvm/
JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64/
export JAVA_HOME
PATH=$PATH:$JAVA_HOME
export PATH

what's wrong here ? And how can I correct it ?

Any help would be appreciated. Thanks :)

Answer 1

You have problem with JAVA_HOME settings.

Instead of

/usr/lib/jvm/java-7-openjdk-amd64/bin

Use this:

/usr/lib/jvm/java-7-openjdk-amd64/

In that case mvn will use:

/usr/lib/jvm/java-7-openjdk-amd64/bin/java

That will solve your problem.

Answer 2

Try to set JAVA_HOME and run maven on the command line:

JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 mvn --version

If this works, it means there is a problem with your environment variable.

Most likely you forgot to source ~/.bashrc after adding the correct path export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 to your .bashrc.

If it doesn't work it means there is a problem with your java installation.