I am not finding any way to setup the SDK in IntelliJ IDEA. Not finding any path to setup the SDK in ubuntu 16.04 LTS for IntelliJ IDEA.
I am working in this IDE for working on mongodb. But can't proceed because of this problem.
To find the path where java is installed on ubuntu, you can run the following command from terminal:
$ whereis java
You may get something like this:
java: /usr/bin/java /etc/java /usr/share/java /usr/lib/jvm
Which means that the java resides at one of the above paths as for example /usr/bin/java
So, that directory should designate in IntelliJ. You can configure in the Project Structure, press Ctrl + Alt + Shift + S, choose Platform Settings -> SDKs, click on green button (+), select the home directory for JDK.
If you don't happen to have a JDK installed you can download the latest version here
You can unpack it to your home directory so that you don't need extra permissions:
~/Downloads$ tar zxvf jdk-<version>-linux-x64.tar.gz -C ~/java/jdk/
And finally reference your new JDK on IntelliJ:
Alt+ Ctrl + Shift + S - Project
来源：https://stackoverflow.com/questions/43661829/how-to-setup-sdk-in-intellij-idea