Setting the JAVA_HOME environment variable in Ubuntu

Question

I\'m pretty new on ubuntu, at some point in the terminal I\'m running:

mortar local:illustrate pigscripts/retail-recsys.pig purchase_input -f params/retail.p         


        

Answer 1

First, you need to decide which installed version of Java to use? No fear, you can pick any you have -

update-java-alternatives -l

One "easy" solution is to add this to "$HOME/.bashrc",

export JAVA_HOME=$(update-java-alternatives -l | head -n 1 | awk -F ' ' '{print $NF}')

This picks the first installed JDK and takes it's JAVA_HOME (the third field) - on my system that's

/usr/lib/jvm/java-1.7.0-openjdk-amd64

Answer 2

put the line export JAVA_HOME=/usr/lib/jvm/java-xxx-oracle in your .profile file at home directory. Note that you have to replace xxx. You may need to logout and login again

Answer 3

In Debian/Ubuntu/Linux Mint, we could add to .bashrc export JAVA_HOME=$(update-java-alternatives -l | head -n 1 | sed 's/\s//g')

Answer 4

you can type java in terminal,if it does not work means your did not install java.if it works, type javac in terminal.if javac dose not work,you should set the java environment variable,if it works ,there maybe something wrong with you program.

Answer 5

By far, the ultimate guide to doing this is here. You don't need to set PATH as much as you just need to adjust the default 'java alternative' location.

Answer 6

Normally you can set paths in

~/.bashrc

with export JAVA_HOME=/usr/lib/jvm/java-version

However you may followe instructions from here for a comprehensive instruction.