Even though the problem has been there since JDG 6 it should be fixed now:
1) The Java HotRod client distribution doesn't include API docs (jboss-datagrid-7.2.0.ER2-remote-java-client.zip ).
2) The API docs for HotRod Java are actually part of the library distributions (jboss-datagrid-7.2.0.ER2-library.zip) They should be removed from here - but only HotRod client part, the other part for library mode should stay there.
3) The main documentation at https://access.redhat.com/documentation/en-us/red_hat_jboss_data_grid/7.1/html/api_documentation/component_apis_and_configuration_schemas includes the Java HotRod API docs under "Red Hat JBoss Data Grid Javadocs" but they should be under "API for Hot Rod Clients" and their title should be "Java Hot Rod Client"