Selected directory is not a valid home for JDK - Intellij IDEA on Ubuntu

Question

After installing Intellij Idea 14, with OracleJDK 1.8 u25 (64 bit) on my 14.04 Ubuntu system, I cannot configure the Java SDK to use any JDK. When I navigate to Module Setti

Answer 1

I came across this error because I did not have JAVA_HOME set.

Adding export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64 (for openjdk 11 in my case) and export PATH=$JAVA_HOME/bin:$PATH to my ~/.bashrc and then running source ~/.bashrc solved the problem for me.