Update README.md

README.md

@@ -13,7 +13,7 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
 contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
 
-
+Requirements: Java JDK 9.0 +
 
 package and build:
 mvn clean package install