Vscode-java: '<>' operator is not allowed for source level below 1.7

[rgerteis]

I'm getting the error: '<>' operator is not allowed for source level below 1.7 in VSCode on a code line like this:
List<Integer> v0 = new ArrayList<>();
The interesting part is that I do not have any JDK installed lower than 1.8.
I am wondering how I could configure the compiler with which option to recognize source as 1.8 and target as 1.8.

Environment

• Operating System: MacOS High Sierra 10.13.4
• JDK version: 1.8.0_172
• Visual Studio Code version: 1.23.1
• Java extension version: 0.3.0

Steps To Reproduce

Java environment is identified though JAVA_HOME environment variable pointing to: /Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home/
Any <> operator causes this error in compilation in my setup.

[fbricon]

Do you see that in a Maven, Gradle or Eclipse project? or a standalone file?
Please note for Maven projects, you need to set the compiler configuration source and target to 1.8, as the default is set to 1.5.

[farkaskid]

Was facing the same issue. The linter will whine for using any language feature above version 1.5(lambdas, try-with-resources).
Changing the Maven source, target works. Thanks @fbricon

[rgerteis]

Okay. That’s the issue then.
I’ll fix my maven file and then it should work.
Sorry for that.
Best
Roman

On 6 Jul 2018, at 05:14, Siddharth Shishulkar [e-mail] wrote:

Was facing the same issue. The linter will whine for using any language feature above version 1.5.
Changing the Maven source, target works. Thanks @fbricon

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[BrentBradburn]

The suggested solution was to correct the Maven project settings, but the problem occurs even when there is no problem there (the project builds from the command-line).

It seems like this may be an issue in 'Microsoft/vscode-maven'

[aaron-suarez]

In case anybody runs into this issue like I did today, I fixed this by adding a <properties> tag to my pom.xml:

<project>
  [...]
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  [...]
</project>

Source: https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

Thanks everyone in this thread, it was very helpful!

[HushTheBlock]

In case anybody runs into this issue like I did today, I fixed this by adding a <properties> tag to my pom.xml:

<project>
  [...]
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  [...]
</project>

Source: https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

Thanks everyone in this thread, it was very helpful!

Thank you. This resolves my problem!