I recently installed openJDK 9 under Ubuntu 17.10 and it seems like IntelliJ IDEA has trouble with it.
Whenever I create a new project IntelliJ can find the JDK, but it seems like it's not configuring it the right way. Here is how it looks like
when I create a HelloWorld.java example it looks like this
and it says 'Can't resolve symbol 'String''.
Everything works fine when I compile via terminal and even with Eclipse.
When I type 'java --version' it says
openjdk 9-Ubuntu
OpenJDK Runtime Environment (build 9-Ubuntu+0-9b181-4)
OpenJDK 64-Bit Server VM (build 9-Ubuntu+0-9b181-4, mixed mode)
Is there a way to fix this problem?