Java 14 Preview features
Answered
Hello,
How do I enable the following preview features using mac open jdk Java 14?
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These features are no longer in preview as there is a final JDK version available with these features, please check these links:
https://www.jetbrains.com/help/idea/project-settings-and-structure.html#preview-policy
https://youtrack.jetbrains.com/issue/IDEA-245212
https://youtrack.jetbrains.com/issue/IDEA-277405
See also https://www.jetbrains.com/help/idea/supported-java-versions.html. If you really need to use the preview features of the older Java releases, you will have to use the older IDE version for that: https://www.jetbrains.com/idea/download/previous.html.