I want to handle the process workflow of diagram.bpmn.xml which created by https://demo.bpmn.io/ in java using workflow engine. which engine will be compatible to read and process the diagram.bpmn.xml in java?
you have to add technical properties to execute the process model in the Camunda BPM Platform.
Have a look at the docs for further details: https://docs.camunda.org/get-started/bpmn20/model/#configure-a-user-task
Hope this helps,