How to change project's java version in Intellij Idea?

Question

I reinstalled java on my laptop with different version, and after that, my project can't run well in Intellij Idea. So I want to know how to change project's java version in Intellij Idea?

Answer 1

1. Make sure that the compiler correctly chose the version:

   You need to go to Settings > Compiler > Java Compiler and update the Target bytecode version

   Easier: press Shift twice and type Java Compiler and will lead you to that.

2. Setup the project SDK Go to Project Structure > Project > Project SDK and add the link to the local Java file

Answer 2

File | Project Structure

Add your new SDKS, and chose right sdk for your Project.