Post empty body with Jersey 2 client

I can't find this in the doc's anywhere, but I believe you can use null to get an empty body:

final MyClass result = ClientBuilder.newClient()
    .target("http://localhost:8080")
    .path("path")
    .queryParam("key", "value")
    .request(APPLICATION_JSON)
    .post(Entity.json(null), MyClass.class)

I found that this worked for me:

Response r = client
    .target(url)
    .path(path)
    .queryParam(name, value)
    .request()
    .put(Entity.json(""));

Pass an empty string, not a null value.