I am using Intellij. It is good, but when I create a new project or import a project the default project language level set to 6 (@override in interfaces). But I want to set it 8 (Lambdas, type annotations etc). How can I do that? I have tried change the settings in "Other Settings" -> "Default Project Structure" and the set the project language level to 8, but no luck. Please someone help me. I have added a screen shoot.
File -> Other Settings -> Default Project Structure...
You can change it in there.
(Edit: It's now called "Structure for New Projects")