lambda expressions are not supported at this language level IDEA

Question

I'm trying to create my first fxml java project and at the initialising stage I'm trying to set cell value factory for the table columnt, for example

      @FXML
        private void initialize() {
        agentId.setCellValueFactory(cellData -> cellData.getValue().getIdProperty());
       .....}

and this is underlined red and gives an error that mentioned in title. Changing language level in project structure gives no effect. What else may be the reason of error?

UPD: I've found that it is nesessary to install java with lambdas that is not included to the official release. I did it and nevertheless it didn't help. I've downloaded it here

Answer 1

I had to do a few things to get rid of this problem.

1. File > Project Structure > Project > Project SDK: Change it to Java 1.8.XX
2. File > Project Structure > Project > Language Level: SDK 8 (in my case SDK default was already 8)
3. File > Project Structure > Modules > Sources > SDK 8 (in my case SDK default was already 8)
4. File > Settings > Build, Execution, Deployment > Compiler > Java Compiler > Project bytecode version > 1.8
5. File > Settings > Build, Execution, Deployment > Compiler > Java Compiler > Per-module bytecode version > Target bytecode version > 1.8

That should do the trick.

Answer 2

the answer is the following: I had to change the language level not only in project structure->project but in project structure-> modules too.