Specify JDK for Maven to use

Question

Hi all. I am trying to build a Hudson plugin I've modified and it requires jdk1.6. This is fine, but I don't see how I can tell maven where the different jdk is. I've found few mentions on the internet but they don't seem to apply to me. Some suggest adding some config to .m2/settings.xml but I don't have a settings.xml. Plus, I don't want to use 1.6 for all maven builds.

One kink is I am using mvn in cygwin, if that matters at all. It appears I should be able to make the specification in the project pom file, but the existing pom is pretty bare.

So bottom line is, is there a way to specify a jdk for a single invocation of maven?

Answer 1

So bottom line is, is there a way to specify a jdk for a single invocation of maven?

Temporarily change your JAVA_HOME.

Answer 2

Hudson also allows you to define several Java runtimes, and let you invoke Maven with one of these. Have a closer look on the configuration page.

Answer 3

I say you setup JAVA_HOME like Pascal is saying: In cygwin if you use bash as your shell should be "export JAVA_HOME=/cygdrive/c/pathtothejdk" And it never harms to also export the java bin dir to the PATH with "export PATH=${JAVA_HOME}/bin:${PATH}"

and also add maven-enforce-plugin to make sure the right jdk is used. This is a good practice for your pom.

<build>
 <plugins>
   <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-enforcer-plugin</artifactId>
      <executions>
        <execution>
          <id>enforce-versions</id>
          <goals>
            <goal>enforce</goal>
          </goals>
          <configuration>
            <rules>
              <requireJavaVersion>
                <version>1.6</version>
              </requireJavaVersion>
            </rules>
          </configuration>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

http://maven.apache.org/plugins/maven-enforcer-plugin/usage.html