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Java 16 Support
Java 16, the latest release of Java at the time of Apache NetBeans 12.4, is supported, including nb-javac which has been upgraded to support Java 16.Install OpenJDK
Go to Tools | Java Platform, click Add Platform, and then "Remote Universal OpenJDK Service", and you'll be able to download and register OpenJDK distros of your choice.Micronaut
In the New Project dialog, choose "Java with Maven" and then "Micronaut Project", to get started with Micronaut development in Apache NetBeans 12.4.