IntelliJ IDEA no code completion for Java 10 'var'?

Question

Recently I installed the new version (2018.1) of IntelliJ IDEA, which added support for Java 10.

But when I trying to use the var (for local variable

Answer 1

As @Vic pointed out, this appears to be a bug. Until it gets fixed, you can create a custom live template as a workaround.

Create a live template triggered by the var abbreviation, then enter var as the template text. Make it available in the Java statement context.

Answer 2

Issue has been fixed in upcoming IntelliJ IDEA 2018.2 release:

https://www.jetbrains.com/idea/nextversion/ (currently EAP version)