REST Response is {} - rest

Question

I am new to REST. I have written a small REST resource and Whenever I try to invoke the REST service from POSTMAN, i get a empty response {} and status code 200
The Request :
http://localhost:8080/demo/managers
#GET
#Path("managers")
#Produces({"application/json"})
public Response getManagers() throws GeneralException, JSONException
{
JSONArray valueString = COMING_FROM_OTHER_METHOD();
System.out.println("==== "+valueString.toString());
return Response.ok(valueString,MediaType.APPLICATION_JSON).build();
}
The correct value I can see in System.out.println():
[{"display":"john","id":"003"},{"display":"hansi","id":"004"},{"display":"samy gayle","id":"005"}]
I want to a JSONArray Response but everytime I get an empty response
{}
But when modify the code like below it gives correct response
#GET
#Path("managers")
#Produces({"application/json"})
public String getManagers() throws GeneralException, JSONException
{
JSONArray valueString = COMING_FROM_OTHER_METHOD();
System.out.println("==== "+valueString.toString());
return valueString.toString();
}
Kindly Help. why am I getting {} when trying to return a Response object J

Answer 1

I would use domain objects rather than String instances:
class Manager {
private String id;
private String display;
... setters/getters ...
}
public ResponseEntity<ArrayList<Manager>> getManagers() throws GeneralException {
ArrayList<Manager> managers = COMING_FROM_OTHER_METHOD();
return new ResponseEntity<>(managers, HttpStatus.OK);
}