问题
I've installed the version 2018.1 of IntelliJ IDEA (COMMUNITY EDITION), which added support for Java 10.
When I tried to use new "var" to type local variable, the IDE highlights it with red colour and the lovely phrase: "Cannot resolve the type "var". Please see attachment varRed
I've read another post that happens exactly the same issue in which a member gave a possible solution https://stackoverflow.com/a/49719734/9478809
I've done that as well, I've created a live template for that type for Java statement but it still doesn't work.
Some of you got any suggestion for that? I will appreciate your help
Thanks in advance.
回答1:
To expand on nullpointer's comment, there are a few things you need to verify:
- Make sure you've downloaded an updated SDK (version 10 or higher). I recommend using sdkman to install the SDK because it helps manage multiple versions. SDKMAN
- Hit cmd; to open Project Structure
- For Project SDK, select your updated java SDK
- For Project language level, select the corresponding level
- Now navigate to Modules, and make sure the correct language level is selected here too. I recommend selecting "Project default" to avoid future confusion.
As a troubleshooting step, it's also helpful to compile on the command line with maven or gradle to make sure it is an IDE configuration issue.
来源：https://stackoverflow.com/questions/49744999/intellij-ide-community-version-doesnt-support-var-declaration-java-10