make sure modules using java8

animal-sniffer-mvn-plugin/pom.xml

@@ -9,7 +9,7 @@
   <url>http://maven.apache.org</url>
   
   <properties>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>	
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>	
     </properties>
 	
   <dependencies>
@@ -26,8 +26,8 @@
 				  <artifactId>maven-compiler-plugin</artifactId>
 				  <version>3.7.0</version>
 				  <configuration>
-					<source>1.6</source>
+					<source>1.8</source>
-					<target>1.6</target>
+					<target>1.8</target>
 				  </configuration>
 				</plugin>
 				<plugin>

annotations/annotation-processing/pom.xml

@@ -15,7 +15,7 @@
 
     <properties>
         <auto-service.version>1.0-rc2</auto-service.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
     </properties>
 
     <dependencies>

apache-shiro/pom.xml

@@ -65,7 +65,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.2</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

camel-api/pom.xml

@@ -12,7 +12,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+		<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
 		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
 		<camel.version>2.19.1</camel.version>
 	    <spring-boot-starter.version>1.5.4.RELEASE</spring-boot-starter.version>

cas/cas-server/pom.xml

@@ -52,7 +52,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.3</version>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
             </plugin>
         </plugins>
         <finalName>cas</finalName>

core-java-9/pom.xml

@@ -90,7 +90,7 @@
         <org.slf4j.version>1.7.21</org.slf4j.version>
         <ch.qos.logback.version>1.2.1</ch.qos.logback.version>
         <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
 
         <!-- testing -->

core-java-sun/pom.xml

@@ -483,7 +483,7 @@
         <avaitility.version>1.7.0</avaitility.version>
 
         <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
     </properties>
 </project>

core-java/pom.xml

@@ -489,7 +489,7 @@
         <avaitility.version>1.7.0</avaitility.version>
 
         <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
     </properties>
 </project>

core-kotlin/pom.xml

@@ -105,7 +105,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>                
                 <executions>
                     <!-- Replacing default-compile as it is treated specially 
                         by maven -->

dubbo/pom.xml

@@ -52,6 +52,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>              
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

ejb/ejb-session-beans/pom.xml

@@ -82,7 +82,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

geotools/pom.xml

@@ -59,6 +59,7 @@
                 <inherited>true</inherited>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>               
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

guest/core-java-9/pom.xml

@@ -16,7 +16,7 @@
     <plugins>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.6.2</version>
+        <version>3.7.0</version>
         <configuration>
           <source>1.9</source>
           <target>1.9</target>

guest/core-java/pom.xml

@@ -22,7 +22,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/junit5-example/pom.xml

@@ -41,7 +41,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/log4j2-example/pom.xml

@@ -39,7 +39,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/logback-example/pom.xml

@@ -30,7 +30,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/memory-leaks/pom.xml

@@ -28,7 +28,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/spring-boot-app/pom.xml

@@ -38,7 +38,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

guest/thread-pools/pom.xml

@@ -17,7 +17,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5.1</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

guest/tomcat-app/pom.xml

@@ -52,7 +52,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

guest/webservices/rest-client/pom.xml

@@ -8,7 +8,7 @@
     <plugins>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.5</version>
+        <version>3.7.0</version>
         <configuration>
           <source>1.8</source>
           <target>1.8</target>

guest/webservices/rest-server/pom.xml

@@ -33,7 +33,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5.1</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

hibernate5/pom.xml

@@ -16,7 +16,7 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<!-- Maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <hibernate.version>5.2.12.Final</hibernate.version>
         <mysql.version>6.0.6</mysql.version>
         <mariaDB4j.version>2.2.3</mariaDB4j.version>

java-difference-date/pom.xml

@@ -41,6 +41,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>               
                 <configuration>
                     <target>1.8</target>
                     <target>1.8</target>

jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/pom.xml

@@ -34,10 +34,10 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.2</version>
+					<version>3.7.0</version>
 					<configuration>
-						<source>1.7</source>
+						<source>1.8</source>
-						<target>1.7</target>
+						<target>1.8</target>
 					</configuration>
 				</plugin>
 				<plugin>

jhipster/jhipster-microservice/car-app/pom.xml

@@ -506,6 +506,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin.version}</version>
                 <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
                     <annotationProcessorPaths>
                         <path>
                             <groupId>org.mapstruct</groupId>

libraries-data/pom.xml

@@ -148,7 +148,7 @@
         <h2.version>1.4.196</h2.version>
         <reladomo.version>16.5.1</reladomo.version>
         <junit.version>4.12</junit.version>
-        <maven-compiler-plugin.version>3.6.2</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <ormlite.version>5.0</ormlite.version>
     </properties>
 </project>

libraries/pom.xml

@@ -107,6 +107,7 @@
             <!-- /Neuroph -->
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>              
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

linkrest/pom.xml

@@ -33,7 +33,7 @@
 		<plugins>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.5</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

mustache/pom.xml

@@ -169,7 +169,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		
 		<!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
 
 		<java.version>1.8</java.version>

parent-boot-4/pom.xml

@@ -15,7 +15,7 @@
         <rest-assured.version>3.0.1</rest-assured.version>                
         <!-- plugins -->
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>      
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>  
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>  
    </properties>
 
     <parent>

parent-boot-5/pom.xml

@@ -15,7 +15,7 @@
         <rest-assured.version>3.0.1</rest-assured.version>        
         <!-- plugins -->
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>      
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>  
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>  
    </properties>
 
     <parent>

patterns/front-controller/pom.xml

@@ -25,6 +25,11 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.7.0</version>
+				<configuration>
+				    <source>1.8</source>
+				    <target>1.8</target>
+				</configuration>
 			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>

patterns/intercepting-filter/pom.xml

@@ -30,6 +30,11 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.7.0</version>
+			                <configuration>
+			                    <source>1.8</source>
+			                    <target>1.8</target>
+			                </configuration>
 			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>

persistence-modules/liquibase/pom.xml

@@ -26,7 +26,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>2.5.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

persistence-modules/spring-hibernate-5/pom.xml

@@ -220,7 +220,7 @@
         <rest-assured.version>2.9.0</rest-assured.version>
 
         <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <maven-resources-plugin.version>2.7</maven-resources-plugin.version>
         <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>

pom.xml

@@ -24,7 +24,7 @@
         <logback.version>1.1.7</logback.version>
         <!-- plugins -->
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
     </properties>
 
     <modules>

saas/pom.xml

@@ -79,6 +79,6 @@
 	</repositories>
 	<properties>
 		<!-- maven plugins -->
-		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+		<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
 	</properties>
 </project>

spring-boot-actuator/pom.xml

@@ -59,6 +59,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>              
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

spring-boot-custom-starter/greeter-spring-boot-autoconfigure/pom.xml

@@ -47,7 +47,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

spring-boot-custom-starter/greeter-spring-boot-starter/pom.xml

@@ -39,7 +39,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.5.1</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

spring-cloud/pom.xml

@@ -43,7 +43,7 @@
         <spring-cloud-starter-hystrix.version>1.2.3.RELEASE</spring-cloud-starter-hystrix.version>
         <spring-cloud-stream.version>1.3.0.RELEASE</spring-cloud-stream.version>
         <spring-boot-starter-web.version>1.4.2.RELEASE</spring-boot-starter-web.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <spring-boot-maven-plugin.version>1.4.2.RELEASE</spring-boot-maven-plugin.version>
     </properties>
 

spring-cloud/spring-cloud-connectors-heroku/pom.xml

@@ -88,7 +88,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.0</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

spring-cloud/spring-cloud-consul/pom.xml

@@ -18,7 +18,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
     </properties>
 
     <dependencies>

spring-cloud/spring-cloud-eureka/pom.xml

@@ -26,7 +26,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <spring-boot-maven-plugin.version>1.4.2.RELEASE</spring-boot-maven-plugin.version>
     </properties>
 

spring-cloud/spring-cloud-eureka/spring-cloud-eureka-client/pom.xml

@@ -48,6 +48,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>                
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-eureka/spring-cloud-eureka-feign-client/pom.xml

@@ -58,6 +58,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>                
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-eureka/spring-cloud-eureka-server/pom.xml

@@ -43,6 +43,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>                
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-gateway/pom.xml

@@ -23,7 +23,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <spring-boot-maven-plugin.version>1.4.2.RELEASE</spring-boot-maven-plugin.version>
     </properties>
 

spring-cloud/spring-cloud-hystrix/feign-rest-consumer/pom.xml

@@ -72,6 +72,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-hystrix/pom.xml

@@ -25,7 +25,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <spring-boot-maven-plugin.version>1.4.2.RELEASE</spring-boot-maven-plugin.version>
     </properties>
 

spring-cloud/spring-cloud-hystrix/rest-consumer/pom.xml

@@ -62,6 +62,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-hystrix/rest-producer/pom.xml

@@ -30,6 +30,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

spring-cloud/spring-cloud-rest/pom.xml

@@ -25,7 +25,7 @@
       
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <spring-boot-maven-plugin.version>1.4.2.RELEASE</spring-boot-maven-plugin.version>
     </properties>
 

spring-cloud/spring-cloud-stream/pom.xml

@@ -22,7 +22,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
     </properties>
 
     <dependencyManagement>

spring-mvc-simple/pom.xml

@@ -141,6 +141,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
+                   <version>3.7.0</version>                 
                     <configuration>
                         <source>1.8</source>
                         <target>1.8</target>

spring-rest-simple/pom.xml

@@ -206,6 +206,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

spring-roo/pom.xml

@@ -500,6 +500,7 @@
 	      <plugin>
 	        <groupId>org.apache.maven.plugins</groupId>
 	        <artifactId>maven-compiler-plugin</artifactId>
+                   <version>3.7.0</version>          
 	        <configuration>
 	          <source>${java.version}</source>
 	          <target>${java.version}</target>

spring-security-mvc-socket/pom.xml

@@ -151,7 +151,7 @@
             <plugins>
                 <plugin>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.1</version>
+                    <version>3.7.0</version>
                     <configuration>
                         <source>1.8</source>
                         <target>1.8</target>

spring-swagger-codegen/spring-swagger-codegen-api-client/pom.xml

@@ -118,10 +118,10 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.6.1</version>
+        <version>3.7.0</version>
         <configuration>
-          <source>1.7</source>
+          <source>1.8</source>
-          <target>1.7</target>
+          <target>1.8</target>
         </configuration>
       </plugin>
       <plugin>

testing-modules/junit-5/pom.xml

@@ -27,7 +27,7 @@
         <h2.version>1.4.196</h2.version>
         <mockito.version>2.11.0</mockito.version>
 
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <junit4.version>4.12</junit4.version>
         <spring.version>5.0.1.RELEASE</spring.version>

vertx-and-rxjava/pom.xml

@@ -17,6 +17,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.7.0</version>              
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>

vraptor/pom.xml

@@ -115,7 +115,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.1</version>
+				<version>3.7.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

xml/pom.xml

@@ -159,6 +159,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-compiler-plugin</artifactId>
+                        <version>3.7.0</version>                       
                         <configuration>
                             <source>${java-version}</source>
                             <target>${java-version}</target>