Create JsonArray without key value

Question

Please help me create jSonArray without keys. It should looks like:

"main" : ["one", "two", "three"]

I have tried it with empty key value:

private String generate(String value) {

    Gson gson = new Gson();
    JsonArray jsonArray = new JsonArray();
    JsonObject jsonObject = new JsonObject();

    jsonObject.addProperty("", value);
    jsonArray.add(jsonObject);

    return gson.toJson(jsonArray);
}

Result looks bad..

"main": "[
  {\"\":\
  "myString value\"}
]"

Answer 1

JsonObject obj = new JsonObject();
JsonArray array = new JsonArray();
array.add(new JsonPrimitive("one"));
array.add(new JsonPrimitive("two"));
array.add(new JsonPrimitive("three"));
obj.add("main", array);

Answer 2

You can do something like:

Gson gson = new Gson();
JsonArray array = new JsonArray();
array.add(new JsonPrimitive("one"));
array.add(new JsonPrimitive("two"));
array.add(new JsonPrimitive("three"));

JsonObject jsonObject = new JsonObject();
jsonObject.add("main", array);;

System.out.println(gson.toJson(jsonObject));

which outputs:

{"main":["one","two","three"]}

Answer 3

What you are trying to do is just to fill an array with primitive variables, to achieve that you have to change your code like this:

private String generate(String value) {

    Gson gson = new Gson();

    JsonArray jsonArray = new JsonArray();
    jsonArray.add(new JsonPrimitive(value));

    return gson.toJson(jsonArray);
}

Answer 4

Sample Code

JSONObject obj = new JSONObject();
JSONArray list = new JSONArray();
list.add("msg 1");
list.add("msg 2");
list.add("msg 3");
obj.put("", list);

You can use this to put an array without key.