# Write a Java module for Transformer

You can write Transfomer modules in Java. Usually you would implement such a module as a [Service blade](../deployment-framework/cdf-blade-types.md#service-blade). For a simple example of how to do this, see How can I... [Create a Java-based Transformer Service blade](../deployment-framework/cdf-create-a-java-based-transformer-service-blade.md).