Ajouter ceci juste avant la balise de fin </project>
	
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.2</version>
				<configuration>
					<source>1.12</source>
					<target>1.12</target>
				</configuration>
			</plugin>
		</plugins>
	</build>