gs-maven: mvn compile throws errors

Hello,

I’m working on this guide, but when I run mvn compile I get the following error:

[ERROR] Source option 1.5 is no longer supported. Use 1.6 or later.
[ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.

I’m on OS X. mvn -v shows:

Maven home: /Users/matthuntington/Desktop/apache-maven-3.5.0
Java version: 9, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.12.6", arch: "x86_64", family: "mac"

echo $JAVA_HOME shows:

/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home

echo $PATH shows:

/Users/matthuntington/Desktop/apache-maven-3.5.0/bin/:/Users/matthuntington/.rbenv/bin:/Users/matthuntington/.rbenv/shims:/Users/matthuntington/anaconda/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

any suggestions? Thanks!

About this issue

Original URL
State: closed
Created 7 years ago
Reactions: 23
Comments: 34 (1 by maintainers)

Commits related to this issue

Quick fix for Java bug https://github.com/spring-guides/gs-maven/issues/21 — committed to sigopt/sigopt-examples by alexandraj777 6 years ago
Specify source and target to avoid build error Related to spring-guides/gs-maven#21 — committed to soarez/qfs by soarez 6 years ago
Specify source and target to avoid build error Related to spring-guides/gs-maven#21 — committed to soarez/qfs by soarez 6 years ago
Specify Java version as 1.8 Pulling down a fresh copy of this repo and running the example command results in compilation errors about source option 5 and target option 1.5 no longer being supported.... — committed to mike-solomon/found-shield-example by mike-solomon 6 years ago
mvn build issue some little workaround for mvn build issues, https://github.com/spring-guides/gs-maven/issues/21 — committed to rafche/check_temp by rafche 5 years ago
mvn build issue some little workaround for mvn build issues, https://github.com/spring-guides/gs-maven/issues/21 Bugfix fixing bug, used wrong execution for destination OS ... — committed to rafche/check_temp by rafche 5 years ago

Most upvoted comments

Solution: I added

<properties>
    <maven.compiler.source>1.6</maven.compiler.source>
    <maven.compiler.target>1.6</maven.compiler.target>
  </properties>

inside the project tag in pom.xml

+477

mahuntington on Oct 17, 2017

mahuntington great solution . Just add in pom

<properties>
<maven.compiler.source>1.6</maven.compiler.source>
<maven.compiler.target>1.6</maven.compiler.target>
 </properties>

and it will compile

+28

strzelaczinho on Feb 12, 2018

<properties>
  <maven.compiler.source>1.8</maven.compiler.source>
  <maven.compiler.target>1.8</maven.compiler.target>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

peterwillcn on Jun 29, 2019

One thing everyone missed to explain for the newbies: When the error states that “version 5 or 1.5” isn’t supported, it’s saying that Maven is trying to compile the java code using the JDK (java developer kit) version 1.5, ans it’s not supported.

ltlombardi on Oct 3, 2018

I had a similar problem: source option 6 is no longer supported use 7 or later target option 6 is no longer supported use 7 or later

this snippet solved it for me <properties> <maven.compiler.source>1.8</maven.compiler.source <maven.compiler.target>1.8</maven.compiler.target> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties>

add it in the pom.xml, properties section Ctrl+S and voila!

AhmadHamed on Jul 7, 2019

Use JavaServlet 3.0-alpha-1 https://mvnrepository.com/artifact/javax.servlet/servlet-api/3.0-alpha-1

<!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>3.0-alpha-1</version>
    <scope>provided</scope>
</dependency>

ghost on Aug 1, 2018

A lot of things to think for a person who is beginning to use maven. Thank you @mahuntington .

juanmiguel431 on Jul 18, 2018

@mahuntington Thanks for solution

larvavral on Apr 15, 2020

Solution: I added

<properties>
    <maven.compiler.source>1.6</maven.compiler.source>
    <maven.compiler.target>1.6</maven.compiler.target>
  </properties>

inside the project tag in pom.xml

@mahuntington Works for me. Thanks a lot!

ankit-suthar on Jan 23, 2020

Can you explain the reason of the error? I also get the same error.

Why does your solution solve the problem?

Thanks.

The reason for the error: maven compiler is a plugin inside the maven system. In the compile life cycle phase, maven takes the java version as configured in maven compiler plugin in the pom. When we have not specified the compiler plugin in the pom it takes the default compiler plugin which comes with maven versions. (eg: maven 2 comes with compiler version 1.4) If we want to use the latest java version at compile time need to provide it as follows

https://maven.apache.org/plugins/maven-compiler-plugin/

manoripriyadarshani on Sep 24, 2019

@mahuntington thanks it works for me.

amitbpal on Jul 9, 2018

Worked for me. thanks, Matt Huntington for an easy solution.

sravankumar4 on Jul 7, 2018

I think the latest version of maven doesn’t support 1.5 anymore. You have to explicitly tell it which version to compile to. Not entirely sure, though.

mahuntington on Jan 8, 2018