Eclipse + Maven: force Execution Environment “JavaSE-1.6” instead of fixed JDK

Question

I\'m using Eclipse as IDE and Maven outside of it to keep all dependencies up to date and update the Eclipse-project as such. In Eclipse I usually specify the JRE system lib

Answer 1

Go into Window > Preferences > Java > Installed JREs > Execution Environments

Select JavaSE-1.6, click the checkbox on the right that should indicate "perfect match"

then use "update project configuration" from the maven menu.

Answer 2

You can do it by setting a classpath container.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-eclipse-plugin</artifactId>
    <version>2.8</version>
    <configuration>
        <classpathContainers>
           <classpathContainer>
    org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6
           </classpathContainer>
        </classpathContainers>
    </configuration>
</plugin>

Reference:

• eclipse:eclipse Mojo > classpathContainers

Answer 3

Since you are using maven and eclipse, perhaps you should use M2Eclipse plugin. The maven project (built by maven by setting JAVA_HOME=C:\Program Files\Java\jdk1.6.0_23) imported in Eclipse, shows up with JRE System Library as JavaSE-1.6