Answers for "maven.compiler.source tag in maven"

properties java 8 maven in pom xml

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

maven compiler plugin for java 13

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-compiler-plugin</artifactId>
	<version>3.8.0</version>
	<configuration>
		<release>13</release>
		<compilerArgs>
			--enable-preview
		</compilerArgs>
	</configuration>
</plugin>