In pom.xml, defined this maven.compiler.source properties to tell Maven to use Java 8 to compile the project.
1. Maven Properties
Java 8
pom.xml
<properties>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
</properties>
Java 7
pom.xml
<properties>
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.source>1.7</maven.compiler.source>
</properties>
2. Compiler Plugin
Alternative, configure the plugin directly.
pom.xml
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
thank you
Hi, having target and source for 1.8 (java8) at project and compiler, However mvn versions:display-dependency-updates suggests me to upgrade to spring6 and logback 1.4.5. Are you aware flags or tricks to get all jars included a war match the needs of a target platform? thx
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Hi, I am using java8 , maven 3.5.2 version and using below configuration in pom.xml for compile java.
org.apache.maven.plugins
maven-compiler-plugin
3.8.0
1.8
1.8
Question: Showing two versions like 49, 52 when I check java major version using javap. Requesting you to suggest me what could be the wrong?
Regards,
Munivelu.
Hello mkyong,
I did use this for java 8. But it is showing error :
lambda expressions are not supported in -source 1.5
[ERROR] (use -source 8 or higher to enable lambda expressions)
This is my pom.xml :
4.0.0
com.example.project
Proect-MVN-Parent
0.0.1-SNAPSHOT
WebApp
false
1.8
1.8
war
Project Maven Webapp
junit
junit
3.8.1
test
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-web
${spring.version}
org.springframework
spring-tx
3.2.4.RELEASE
javax.ws.rs
javax.ws.rs-api
2.0-m03
com.fasterxml.jackson.core
jackson-core
2.6.3
com.fasterxml.jackson.core
jackson-databind
2.6.3
org.springframework
spring-jdbc
3.0.3.RELEASE
javax.servlet
javax.servlet-api
${servlet.version}
provided
org.hibernate
hibernate-core
${hibernate.version}
org.hibernate
hibernate-entitymanager
${hibernate.version}
org.springframework.data
spring-data-jpa
1.10.5.RELEASE
aopalliance
aopalliance
1.0
org.aspectj
aspectjrt
1.8.11
org.aspectj
aspectjweaver
1.8.11
YLogAPI
org.apache.maven.plugins
maven-compiler-plugin
3.6.1
${maven.compiler.source}
${maven.compiler.target}
Are you compiling with idea or mvn by itself form command line?
With jdk 8 tomcat integration getting lots of issues