OpenClover 4.5.0 Release Notes
We're happy to share with you OpenClover 4.5!
Support for Java 17 (experimental)
We are thrilled to announce support for Java 17. This is thanks to amazing contributions by
and SATO Yusuke
This is an experimental version. While support for nearly all new language syntax features has been added,
except case expressions, there might still be
some corner cases undiscovered. We kindly ask you to report any bugs with code instrumentation and compilation in our
. Also, OpenClover does not automatically
instrument module-info.java files, so you might need to add imports manually.
We expect to drop support for Java 7 in a next release.
Annotations on data types
Long-awaited support for annotations on data types is here too! Huge "thank you!" for
. OpenClover will no longer fail on annotations put
in places like these:
class A<@Annotation1 T>
class A implements @Annotation2 Serializable
int @Annotation3  intArray
int intArray @Annotation4 
obj instanceof @Annotation5 String
new @Annotation6 HashMap<>()
new int @Annotation7
void a() throws @Annotation8 Exception
We migrated all our Mercurial repositories hosted on Bitbucket to Git repositories hosted on GitHub.
We moved our issue tracker as well. You can find everything on
Build system migration
We migrated from Ant to Maven.
End of life for Grails and Hudson plugins
We will no longer develop Grails Clover Plugin. It integrated with Grails 2.x only and this release line
is no longer maintained. As Grails 3.0 and newer use Gradle, please try to use the Gradle Clover Plugin instead.
Similarly, the Hudson CI is dead since long time, so we will no longer publish new releases of the
Hudson Clover Plugin. We recommend migration to Jenkins or Bamboo instead.
Java 1.6 and older is unsupported
OpenClover requires at least Java 1.7 to run. You can still use "1.3-1.6" source level flag, but it will be
treated as 1.7.
Groovy 2.0.0 and older is unsupported
Minimum Groovy version is 2.0.1.
Upgrading from OpenClover 4.4.x
Clover for Ant
Simply download new Clover-for-Ant zip file and use the clover.jar from it.
Clover for Eclipse
Download new update site ZIP and install in your Eclipse.
Clover for IDEA
Download new plugin JAR and install in your IDEA.
Clover Maven Plugin
Bump version number to 4.5.0 for 'org.openclover:clover-maven-plugin' and 'org.openclover:clover' in
your pom.xml files.
Jenkins Clover Plugin
Upgrade to the latest 4.12.0 plugin version.
2023.10.04 OpenClover 4.5.0