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Chapter 5. Configuring the Java compiler

By default, the Quarkus Maven plug-in passes compiler flags to the javac command from the maven-compiler-plugin plug-in.

To customize the compiler flags used in development mode, add a configuration section to the plugin block and set the compilerArgs property. You can also set source, target, and jvmArgs. For example, to pass --enable-preview to both the JVM and javac add the following lines: 

<plugin>
  <groupId>io.quarkus</groupId>
  <artifactId>quarkus-maven-plugin</artifactId>
  <version>${quarkus-plugin.version}</version>

  <configuration>
    <source>${maven.compiler.source}</source>
    <target>${maven.compiler.target}</target>
    <compilerArgs>
      <arg>--enable-preview</arg>
    </compilerArgs>
    <jvmArgs>--enable-preview</jvmArgs>
  </configuration>

  ...
</plugin>
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