IntelliJ IDEA 13 uses Java 1.5 despite setting to 1.7

148

Despite specifying JDK 1.7 in all project settings (including in File -> Project Structure -> Project :: Project SDK), the following error is produced by IntelliJ 13 when trying to compile some simple Java 7 code which does use the diamond operator:

java: diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)

Is there any other place in the configuration where the expected -source 7 option should be enabled?

This question is tagged with java intellij-idea compilation

~ Asked on 2014-01-08 20:45:22

The Best Answer is


115

If nothing of this helps (my case), you can set it in your pom.xml, like this:

<properties>
  <maven.compiler.source>1.7</maven.compiler.source>
  <maven.compiler.target>1.7</maven.compiler.target>
</properties>

As this cool guy mentioned here: https://stackoverflow.com/a/25888116/1643465

~ Answered on 2014-11-13 23:04:17


156

Please check your project/module language levels (Project Structure | Project; Project Structure | Modules | module-name | Sources). You might also want to take a look at Settings | Compiler | Java Compiler | Per-module bytecode version.

Set also this:

File -> Project Structure -> Modules :: Sources (next to Paths and Dependencies) and that has a "Language level" option which also needs to be set correctly.

~ Answered on 2014-01-08 20:51:05


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