Enable lambda expression in Java 8 in Intelij

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.

Ach, S**T, this i classic one. IDEs just get in your way. I needed to set also the MODULE LEVEL. — oz123, Sep 30 '15 at 08:48

score 14 · Accepted Answer · edited May 23 '17 at 12:18

14

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

edited May 23 '17 at 12:18

Community

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answered Sep 30 '15 at 08:50

oz123

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akhil_mittal · Answer 2 · 2018-09-16T02:14:29.240

7

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.

edited Sep 16 '18 at 02:14

answered Sep 30 '15 at 09:07

akhil_mittal

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This is exactly what I did with out success. See my screenshot above. – oz123 Sep 30 '15 at 10:22

Enable lambda expression in Java 8 in Intelij

2 Answers2