Add Explicit Java Compiler Release Option

[kilo52]

In Java-based project source templates, the --source and --target compiler options are correctly set as defaults in the project's POM. However, the --release compiler option is missing by default. It should also be added so that when compiling with a JDK version that is larger than the minimum Java version supported by the underlying project, the compiled bytecode is compatible to the minimum supported Java version.

For example:

When setting up a project with support for Java 8, while using a JDK for Java > 8, then omitting the --release compiler option might produce bytecode which cannot be run by a JVM using Java 8. Possible example error at runtime when using java.nio.ByteBuffer: Example

Possible solution:

Add the --release compiler option in the affected project source template POMs.

Perhaps this needs to be encapsulated in a Maven profile since that compiler option is only available in Java 9 and higher. For example, when a project still supports Java 8 and someone wants to compile it with a JDK 8 then simply setting the compiler option in the global project properties might not work.