Enable lambda expression in Java 8 in Intelij [duplicate]

Question

I am trying to follow the spark java tutorial. I set up all things, and tried compiling the project. I got the following error:

Error:(8, 34) java: lambda expressions are not supported in -source 1.5
  (use -source 8 or higher to enable lambda expressions)

I then tried setting the compiler options and the default JDK, but I am still seeing that error.

Here is how I set my IDE:

I would be happy if you could help me.

Answer 1

It's not enough to set the project level. You need to set up the Module level.

Follow these steps.

Right Click on the project------>> go to Open module Settings--->
In that opening window click the Project in project settings---->
and set project SDK

See this answer https://stackoverflow.com/a/21747364/492620

Answer 2

Select project and press alt+ctrl+shift+s and you get Project Structure window where you need to set project sdk and language level for project.

Then you should be able to use lambdas.