Re: [m2e-users] Compiler version weirdness

[Anders Hammar <anders@xxxxxxxxxx>]

I just tested this and with the staged 0.12.0 version of m2e core, the jre version is set correctly. I tested with a project defining maven-compiler-plugin v2.3.2 and configured with source/target to 1.6.
However, I know from experience that this was an issue with older versions (0.10.0 and most likely 0.10.2) of m2e-core.

As a workaround when this doesn't work automatically upon import or creating a Maven project, forcing a "Update Project Configuration" fixes it.

/Anders

On Wed, Nov 3, 2010 at 22:07, Fred Bricon <fbricon@xxxxxxxxx> wrote:

David,

starting from version 2.3.2, maven-compiler-plugin defaults to source 1.5. This is the version defined by default in maven 3.0 final, previous versions used source = 1.4.

In order for m2eclipse to configure java source compiler to 1.5 by default, you need to either lock the maven-compiler-plugin version in your pom (highly advised) :
...
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
            </plugin>
         ...
       </plugins>
    </build>

or you can pick an m2eclipse-core plugin based on maven 3.0 (0.12.0 has been staged here [1]). However, due to an incompatibility between core 0.12.0 and current m2e-wtp 0.11.0, you'd better wait for a fix in the next few days before upgrading.

[1] https://repository.sonatype.org/content/repositories/forge-sites/m2e/0.12.0/S/0.12.0.20101102-1505/
[2] https://issues.sonatype.org/browse/MNGECLIPSE-2483


regards,

Fred Bricon

2010/11/3 David Balažic <david.balazic@xxxxxxxxxxxx>

Hi!

I use Eclipse Java EE Helios SR-1
and m2eclipse items:
 - feature 0.10.2
 - subclipse.feature 0.10.0
 - scm.feature 0.10.0
 - wtp.feature 0.11.0.20101024-0955

I created a new maven project and noticed that the Eclipse classpath and compiler versions
are set to 1.4.

This page* says:
the default source setting is 1.5 and the default target setting is 1.

So I wonder why does m2eclipse configure 1.4 in the Eclipse project.

* - http://maven.apache.org/plugins/maven-compiler-plugin/


David Balažic
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