diff --git a/content/en/docs/concepts/extend-kubernetes/operator.md b/content/en/docs/concepts/extend-kubernetes/operator.md
index 96a17ada96..3c2fc9890d 100644
--- a/content/en/docs/concepts/extend-kubernetes/operator.md
+++ b/content/en/docs/concepts/extend-kubernetes/operator.md
@@ -111,6 +111,7 @@ Operator.
 {{% thirdparty-content %}}
 
 * [Charmed Operator Framework](https://juju.is/)
+* [Java Operator SDK](https://github.com/java-operator-sdk/java-operator-sdk)
 * [Kopf](https://github.com/nolar/kopf) (Kubernetes Operator Pythonic Framework)
 * [kubebuilder](https://book.kubebuilder.io/)
 * [KubeOps](https://buehler.github.io/dotnet-operator-sdk/) (.NET operator SDK)