When i use ListContainersCmd with no filter, i expext to generate a request like that : /v1.23/containers/json

but with docker java i have that : /containers/json?filters=%7B%7D

That's because in ListContainersCmdExec

if (command.getFilters() != null) {
            webTarget = webTarget
                    .queryParam("filters", urlPathSegmentEscaper().escape(FiltersEncoder.jsonEncode(command.getFilters())));
        }

but command.getFilters() is never null, it's a Builder and it return an empty but not null map.

If you are ok i do a PR