Develop Reference

Java: Array of Arrays from JSON

I have a JSON Arrays of Array like this
"results": [
{
"id": "AAA",
"color": "#4D4837",
"links": {
"self": "https://aaa.com",
"html": "https://bbb.com",
"download": "https://ccc.com",
"download_location": "ddd.com"
},
"categories": [],
"likes": 3891,
},
{
"id": "BBB",
"color": "#4D453",
"links": {
"self": "https://abb.com",
"html": "https://bcc.com",
"download": "https://ccc.com",
"download_location": "ddd.com"
},
"categories": [],
"likes": 3000,
}
]
And I would like to retrieve "https://bbb.com" and "https://bcc.com" of "html", but I don't know how to do that.
Based on kindly comment, I put the following.
somehow, "getJSONObject()"can not be put. The error message says "Cannot resolve method 'getJSONObject' in 'JSONArray'".
JSONArray array = new JSONArray((Collection) jobjt.get("Strings"));
for (int i =0 ; i<2 ; i++){
JSONObject job = (JSONObject) array.get(i); --> get(i) can not be changed to getJSONObject(i)
String id = job.get("id").toString();
String color = job.get("color").toString();
String photoUrl = job.get("links").toString(); --> By updating here, I want to store only "https://bbb.com" and "https://bcc.com".
}
But when I tried to use the following, not only "html", but "self" and the other information are retrieved.
String photoUrl = job.get("links").toString();
Please tell me how to retrieve only "html".
I am using IntelliJ.

Steps to be followed(assuming you have proper JSONArray you mentioned):
get JSONObject from your JSONArray by index ie. for your case, index=0 here
Get the inner JSONObject by key of links
Now, access your content by key of html
Example for your case:
JSONObject indexedObject = jsonArray.getJSONObject(0);
JSONObject linksObject = indexedObject.getJSONObject("links");
String html= linksObject.getString("html");
Better keep checking if key exists as Harshal suggests

How would I access this key within a JSON object in Java?

I've been having some problems iterating through a JSON object in Java.
Specifically, I'd like to save each value for "name" to the string array "nameList". I've looked up how to do this, and I haven't found a way for this situation.
String[] nameList = new String[]{};
{
"data": {
"Narray": {
"0":
{
"_id": "001",
"name": "studio",
"date": "02141992"
},
"1":
{
"_id": "002",
"name": "venue",
"date": "09041999"
}
}
}

Ideally you'd want Narray to be an actual JSON array, enclosed in [], with each element being another object, containing the property you need, like this:
{
"Narray": [
{
"_id": "001",
"name": "studio",
"date": "02141992"
},
{
"_id": "002",
"name": "venue",
"date": "09041999"
}
]
}
Then you can use jackson to decode the JSON string into a POJO structure. Once you have the objects, you can iterate over the array and retrieve the property you need into a list.

I assume that you only want to save each value of name into a String[] (string array), so you don't need to deserialize the JSON string to POJO, just use basic API to achieve what you want as follows:
BTW, your JSON string is invalid, you miss a right bracket.
ObjectMapper mapper = new ObjectMapper();
JsonNode nArray = mapper.readTree(jsonStr).get("data").get("Narray");
String[] nameList = new String[nArray.size()];
for (int i = 0; i < nArray.size(); i++) {
nameList[i] = nArray.get(String.valueOf(i)).get("name").asText();
}
System.out.println(Arrays.toString(nameList));
Console output:
[studio, venue]

Remove a String from Json Object

I am trying to convert an Avro Kafka Event to Json and need to manipulate The Avro Event by Removing Strings from this Event.
I am using GSON Library to manipulate the Json String Object but somehow its not removing the intended String.
JsonElement je = new Gson().fromJson(matchRequest, JsonElement.class);
JsonObject jo = je.getAsJsonObject();
jo.remove("com.XXX.XXXX");
jo.remove("com.XXX.XXX");
jo.remove("com.XXX.XXX");
System.out.println("#################"+jo);
Json String I am Receiving as matchRequest is
{"interaction_id":"321","customer_id":"32","context_id":"123","work_id":"ewq","work_request_id":"213","task_type":"123","match_type":"wert","resource_list":{"com.xxx.xxxx":{"rank":1,"resource_data":{"com.xxx.xxxx":{"account_id":1,"source_name":"Mankind","channel_id":"voice"}}}},"service_list":{"com.xxx.xxxx":{"rank":5,"priority":1,"resource_count":"gvk","min_proficiency":"10","max_proficiency":"1","attributes":{"com.xxx.xxxx":{"category":"edw","value":"33232"}},"resource_offered":{"com.xxx.xxxx":{"agent_id":"rewq","account_id":"123","source_name":"wqe","resource_address":"ewq","source_address":"rewq","channel_id":"212","channel_provider":"wqe"}}}},"matching_state":"OFFERED"}
JSON Format
"interaction_id": "321",
"customer_id": "32",
"context_id": "123",
"work_id": "ewq",
"work_request_id": "213",
"task_type": "123",
"match_type": "wert",
"resource_list": {
"com.XXXXXX": {
"rank": 1,
"resource_data": {
"com.XXXX": {
"account_id": 1,
"source_name": "Mankind",
"channel_id": "voice"
}
}
}
},
"service_list": {
"com.XXXX": {
"rank": 5,
"priority": 1,
"resource_count": "gvk",
"min_proficiency": "10",
"max_proficiency": "1",
"attributes": {
"com.XXXX": {
"category": "edw",
"value": "33232"
}
},
"resource_offered": {
"com.XXXX": {
"agent_id": "rewq",
"account_id": "123",
"source_name": "wqe",
"resource_address": "ewq",
"source_address": "rewq",
"channel_id": "212",
"channel_provider": "wqe"
}
}
}
},
"matching_state": "OFFERED"
}

When you look at the documentation of the remove() method, it needs a key from the JSON object in parameter.
However, the JSON you are receiving does not contain "com.xxx.xxxx" as key, but some keys, like "resource_list", are linked to another JSON object containing "com.xxx.xxxx" as a key.
You may want to look recursively into the JSON object you receive to remove the intended String.

You need to perform your operation over your array:
jo.getAsJsonObject("resource_list").remove("com.XXX.XXXX");
This should do the trick.

JSON different objects in an array

At the moment i'm trying to understand json and how it works.
But i have a problem with an array of objects.
all objects in the array have a key called "value" (i know it's weird, it's not my code) what also is an object.
And now to the problem: This object called "value" has always different key-values.
So i dont now how i can parse the json code to java object code, when it differ, every time.
Here some examples:
First object of the array:
"value":
{
"local":
[
"English", "Deutsch", Espanol"
],
"english":
[
"English", "Deutsch", Espanol"
],
},
Second object(now a string, not object) of the array:
"value" : "",
Third object of the array:
"value" : {},
...
Maybe I'm doing the parsing wrong.
First I have created the beans classes in java for the json code and then I'm using the automatic parser of google. (gson)
It works when only one of the examples above is inside the json code. (it should not differ, like changing from string to object...)
Gson gson = new Gson();
Output output = gson.fromJson(json, Output.class);
Output is the main class for the json stuff.
I have found out that maybe while parsing I could check a value called "id" first, and from that I could create another beans class with the right variables ...
Thats the code i need to parse to java objects and how do you do that??
The problem is the key called "value", because its always different.
With my method of using the google parser "gson" it wont work, because i'm getting exception that its an string but i was waiting for an object...
{
"status":"success",
"data":{
"panel":{
"title":{
"label":{ "local":"Tote Selection", "english":"Tote Selection" },
"image":"public/img/pick.jpg", "type":"default"
},
"isFirst":false, // currently not used
"isLast":false, // currently not used
"ownCount":0, // currently not used
"panelsCount":0, // currently not used
"elements":[
{
"type":"text",
"id":"1", "value":{ "local":"Scan next order tote",
"english":"Scan next order tote" },
"label":{ "local":"", "english":"" }, "color":"000000",
"fontsize":18, "fontstyle":"flat", "alignment":"left",
"rows":"undefined", "bgcolor":"", "isFocus":false
},
{
"type":"text",
"id":"4", "value":{ "local":"Scan tote: ", "english":"Scan tote: " },
"label":{ "local":"", "english":"" }, "color":"000000", "fontsize":20,
"fontstyle":"strong", "alignment":"left", "rows":"undefined",
"bgcolor":"", "isFocus":false
},
{
"type":"input",
"id":"6", "value":"", "label":{ "local":"", "english":"" },
"color":"000000", "fontsize":24, "fontstyle":"flat", "alignment":"left",
"rows":"undefined", "isFocus":true
},
{
"type":"button",
"id":"1", "value":{ "local":"", "english":"" },
"label":{ "local":"Menu", "english":"Menu" }, "color":"000000",
"fontsize":14, "fontstyle":"strong", "alignment":"left",
"rows":"undefined", "isFocus":false
},
{
"type":"button",
"id":"4", "value":{ "local":"", "english":"" },
"label":{ "local":"Enter", "english":"Enter" }, "color":"000000",
"fontsize":14, "fontstyle":"strong", "alignment":"right",18
"rows":"undefined", "isFocus":false
}
]
},
"authToken":"0fdd440a-619f-4936-ab74-d189accb5bd9",
"routing":{
"controller":"panel",
"action":"process",
"workflowId":"singlepicking",
"taskId":"orderSelection"
}
}
}
Thank you for your help!

it looks a little bit different but your answer helped me! Thx
JsonParser parser = new JsonParser();
JsonObject obj = parser.parse(br).getAsJsonObject();
//now getting all the json values
String status = obj.get("status").getAsString();
JsonObject data = obj.getAsJsonObject("data");
String authToken = data.get("authToken").getAsString();
JsonObject routing = data.getAsJsonObject("routing");
String controller = routing.get("controller").getAsString();
String action = routing.get("action").getAsString();
String workflowId = routing.get("taskId").getAsString();

If I understood ur question properly u can retrieve the values of the JSONArray as below
for (int i = 0; i < JArray.length(); i++) {
print(JArray.getJSONObject(i).tostring())
}
So if i am right u are getting the JSON from a String First?? so please try below first store the String in JSONObject as JSONObject obj = new JSONObject(str);//str is the string that u are getting
to get the valueenglish that are in data-panel-tittle-label is
String englishinLable=obj .getJSONObject("data").getJSONObject("panel").getJSONObject("title").getJSONObject("label").optString("english")

How to parse data from JSON array coming from FB graph API?

I am new to JSON. I'm working with the json processing library. Given a JSON such as:
{
"data": [
{
"name": "John Doe",
"id": "2980311"
},
{
"name": "Jane Doe",
"id": "10221412"
},
{
"name": "George Doe",
"id": "111623489"
}
],
"paging": {
"blah" : "blah"
}
}
How can I get the id values. I've started by trying to get an array to work with:
String URL = "https://graph.facebook.com/username/friends?access_token=";
String token = "";
String[] response = loadStrings(URL+token);
if(response != null) {
JSONObject result = new JSONObject(response);
JSONArray data = result.getJSONArray("data");
}
And this prints out:
JSONObject["data"] not found.
JSONObject["data"] is not a JSONArray.
But it's definitely getting the data. If I print out response I see the data.
What am I missing?

I'm not seeing a JSONObject constructor in that library that accepts String[] (the type of your response variable). There's JSONObject(String) and there's JSONObject(Object). If you pass a String[] into JSONObject, it'll match the latter, which doesn't (immediately) look to me like it'll do what you want.
I suspect you want to get a single String from the URL, which you'd then pass into JSONObject(String), at which point things should start working correctly.

try with this..
GraphObject responseGraphObject = response.getGraphObject();
JSONObject json = responseGraphObject.getInnerJSONObject();
JSONObject sys = json.getJSONObject("data");
Log.e("urlimage json", sys.getString("url"));