ArrayList<String> listdata = new ArrayList<String>();
JSONArray jArray = (JSONArray)jsonObject;
if (jArray != null) {
for (int i=0;i<jArray.length();i++){
listdata.add(jArray.getString(i));
}
}
Top answer 1 of 16
204
ArrayList<String> listdata = new ArrayList<String>();
JSONArray jArray = (JSONArray)jsonObject;
if (jArray != null) {
for (int i=0;i<jArray.length();i++){
listdata.add(jArray.getString(i));
}
}
2 of 16
85
I've done it using Gson (by Google).
Add the following line to your module's build.gradle:
dependencies {
// ...
// Note that `compile` will be deprecated. Use `implementation` instead.
// See https://stackoverflow.com/a/44409111 for more info
implementation 'com.google.code.gson:gson:2.8.2'
}
JSON string:
private String jsonString = "[\n" +
" {\n" +
" \"id\": \"c200\",\n" +
" \"name\": \"Ravi Tamada\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c201\",\n" +
" \"name\": \"Johnny Depp\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c202\",\n" +
" \"name\": \"Leonardo Dicaprio\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c203\",\n" +
" \"name\": \"John Wayne\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c204\",\n" +
" \"name\": \"Angelina Jolie\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"female\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c205\",\n" +
" \"name\": \"Dido\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"female\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c206\",\n" +
" \"name\": \"Adele\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"female\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c207\",\n" +
" \"name\": \"Hugh Jackman\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c208\",\n" +
" \"name\": \"Will Smith\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c209\",\n" +
" \"name\": \"Clint Eastwood\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c2010\",\n" +
" \"name\": \"Barack Obama\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c2011\",\n" +
" \"name\": \"Kate Winslet\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"female\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" },\n" +
" {\n" +
" \"id\": \"c2012\",\n" +
" \"name\": \"Eminem\",\n" +
" \"email\": \"[email protected]\",\n" +
" \"address\": \"xx-xx-xxxx,x - street, x - country\",\n" +
" \"gender\" : \"male\",\n" +
" \"phone\": {\n" +
" \"mobile\": \"+91 0000000000\",\n" +
" \"home\": \"00 000000\",\n" +
" \"office\": \"00 000000\"\n" +
" }\n" +
" }\n" +
" ]";
ContactModel.java:
public class ContactModel {
public String id;
public String name;
public String email;
}
Code for converting a JSON string to ArrayList<Model>:
Note: You have to import java.lang.reflect.Type;:
// Top of file
import java.lang.reflect.Type;
// ...
private void parseJSON() {
Gson gson = new Gson();
Type type = new TypeToken<List<ContactModel>>(){}.getType();
List<ContactModel> contactList = gson.fromJson(jsonString, type);
for (ContactModel contact : contactList){
Log.i("Contact Details", contact.id + "-" + contact.name + "-" + contact.email);
}
}
Hope this will help you.
Top answer 1 of 3
2
You can use this block of code to convert JSONArray to the arraylist object.
JSONArray jsonArray=new JSONArray();
arrayList=new ArrayList();
n=jsonArray.length();
for (int i=0;i<n;i++)
arrayList.add(jsonArray.get(i));
Happy coding!!
2 of 3
0
Internally this JsonArray implements list interface so type casting to List is perfectly fine. Moreover iterating each and every element will access list one by one which will be overhead(Performance impact).
If you need alternate way you can use toCollection static method from the same JsonArray class
BeginnersBook
beginnersbook.com › 2024 › 06 › convert-json-array-to-arraylist-in-java
Convert JSON Array to ArrayList in Java
June 13, 2024 - 2. Parse the JSON Array and Convert ... \"age\":34}]"; // Convert JSON array to JSONArray JSONArray jsonArray = new JSONArray(jsonArrayString); // Convert JSONArray to ArrayList ArrayList<JSONObject> arrayList = new ArrayList<>(); for (int i = 0; i < jsonArray.length(); i++) { ...
Top answer 1 of 16
196
ArrayList<String> list = new ArrayList<String>();
JSONArray jsonArray = (JSONArray)jsonObject;
if (jsonArray != null) {
int len = jsonArray.length();
for (int i=0;i<len;i++){
list.add(jsonArray.get(i).toString());
}
}
2 of 16
63
If you don't already have a JSONArray object, call
JSONArray jsonArray = new JSONArray(jsonArrayString);
Then simply loop through that, building your own array. This code assumes it's an array of strings, it shouldn't be hard to modify to suit your particular array structure.
List<String> list = new ArrayList<String>();
for (int i=0; i<jsonArray.length(); i++) {
list.add( jsonArray.getString(i) );
}
Javatpoint
javatpoint.com › how-to-convert-json-array-to-arraylist-in-java
How to Convert JSON Array to ArrayList in Java - Javatpoint
How to Convert JSON Array to ArrayList in Java with java tutorial, features, history, variables, object, programs, operators, oops concept, array, string, map, math, methods, examples etc.
Baeldung
baeldung.com › home › json › jackson › convert json array to java list
Convert JSON Array to Java List | Baeldung
August 13, 2025 - Learn how to convert a JSON array to a Java List using the popular Gson and Jackson libraries.
Coderanch
coderanch.com › t › 697439 › java › convert-JSON-Array-arraylist
how to convert JSON Array to arraylist (Java in General forum at Coderanch)
posted 8 years ago · 2 · Number of slices to send: Optional 'thank-you' note: Send · Melody Putri wrote:Hi, I'm receiving data in form of JSON Array. Here's the JSON Array that i've received : [{"FOODID":"Jus Alpukat","PRICE":"7000","NUM":"1","RES":"7000.0","ORDERID_FK":""},{"FOODID":"Ice Cream","PRICE":"5000","NUM":"10","RES":"50000.0","ORDERID_FK":""}] i need it to be converted into arraylist that will be inserted into JTable into java.
Java Code Geeks
javacodegeeks.com › home › core java
Converting JSON Array to Java List with Gson - Java Code Geeks
April 25, 2024 - This method entails manual traversal of the JSON array, with each element converted into a Java object. Here’s a practical implementation: String json = "[{\"name\":\"John\"},{\"name\":\"Doe\"}]"; JsonArray jsonArray = JsonParser.parseStr...
Top answer 1 of 2
3
It is not specified, which JSON parser do you use, so I suppose you can choose right now and I'll suggest using Gson as such.
The better solution for deserializing such a structures is creating a special class for each structure, for example:
public class NameURIPair {
private String name;
private String URI;
// getters
}
Then your JSON can be deserialized into a class, which holds the resulting List in it:
public class Data {
private List<NameURIPair> output;
// getter
}
// ...
Data data = new Gson(stringData, Data.class);
Since you've requested the other way, you still can get just the parsed JSON into JsonElement with JsonParser
JsonElement root = new JsonParser().parse(stringData);
Although I won't give you the full solution not to appreciate this kind of solutions :-)
2 of 2
2
Aazelix, your Json output seem to be missing opening array bracket. Its correct form is listed below:
{"output":[{"name":"Name3","URI":"Value3"},{"name":"Name5","URI":"Value5"},{"name":"Name4","URI":"Value4"}]}
As for the conversion to POJO
List<MyObj> list = new ArrayList<>();
if (outputs!= null) {
int len = outputs.length();
for (int i=0; i<len; i++) {
JSONObject o = (JSONObject) outputs.get(i);
list.add(new MyObj(o.getString('name'), o.getString('URL')));
}
}
System.out.println("There is " + list.size() + " objects.");
public static final class MyObj {
final String name;
final String url;
public MyObj(String name, String url) {
this.name = name;
this.url = url;
}
}
HowToDoInJava
howtodoinjava.com › home › gson › gson – parse json array to java array or list
Gson - Parse JSON Array to Java Array or List
April 4, 2023 - Here ArrayItem is the class type of data elements in the array. ArrayItem[] userArray = new Gson().fromJson(jsonSource, ArrayItem[].class); For converting such JSON array to a List, we need to use TypeToken class.
Java Code Geeks
examples.javacodegeeks.com › home › java development › core java
JSON array to List - Java Code Geeks
October 2, 2023 - <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.8</version> </dependency> Here’s a working example of how to use the Gson library to convert a JSON array to an ArrayList. ... package com.jcg.example; import com.google.gson.Gson; import java.util.ArrayList; import java.util.Arrays; public class Main { public static void main(String[] args) { // JSON array as a string String jsonArrayString = "[\"apple\", \"banana\", \"orange\", \"grape\"]"; // Create a Gson object Gson gson = new Gson(); // Convert JSON array to ArrayList String[] jsonArray = gson.fromJson(jsonArrayString, String[].class); ArrayList<String> arrayList = new ArrayList<>(Arrays.asList(jsonArray)); // Output the ArrayList System.out.println("ArrayList: " + arrayList); } }
Mkyong
mkyong.com › home › java › how to parse json array with jackson
How to parse JSON Array with Jackson | mkyong.com
April 23, 2024 - convert JSON array to Array objects Person[] person1 = mapper.readValue(jsonArray, Person[].class); for (Person p : person1) { System.out.println(p); } // 2. convert JSON array to List List<Person> person2 = mapper.readValue(jsonArray, new TypeReference<>() { }); person2.forEach(System.out::println); ...
Stack Overflow
stackoverflow.com › questions › 34083367 › how-to-convert-json-array-to-java-arraylist-object
How to convert JSON Array to Java ArrayList object - Stack Overflow
JSONArray arr = new JSONArray(yourJSONresponse); List<String> list = new ArrayList<String>(); for(int i = 0; i < arr.length(); i++){ list.add(arr.getJSONObject(i).getString("name")); }
How to do in Java
howtodoinjava.com › home › convert json array to list in java: jackson, gson, org.json
Convert JSON Array to List in Java: Jackson, Gson, Org.json
2 weeks ago - JsonMapper mapper = JsonMapper... or new TypeToken<List<String>>() {} in Gson. In Org.json, new JSONArray(json).toList() returns the strings as a List<Object>....
Apps Developer Blog
appsdeveloperblog.com › home › java › java json › convert json array to java list using jackson
Convert JSON Array to Java List using Jackson - Apps Developer Blog
March 22, 2024 - import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import java.util.ArrayList; import java.util.List; public class ManualConversionExample { public static void main(String[] args) { String jsonArrayString = "[{\"id\": 1, \"name\": \"John\"}, {\"id\": 2, \"name\": \"Jane\"}]"; ObjectMapper objectMapper = new ObjectMapper(); try { JsonNode jsonArray = objectMapper.readTree(jsonArrayString); List<Person> personList = new ArrayList<>(); for (JsonNode element : jsonArray) { Person person = objectMapper.treeToValue(element, Person.class); personList.a
Top answer 1 of 5
3
Simple example :
List<Model> data = new ArrayList<>();
JSONArray jsonArray = jsonObject.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
data.add(new Model(/*fill your data*/));
}
2 of 5
1
Move this before the for loop
ArrayList<OrderUser> listOrderUser = new ArrayList<OrderUser>();
Then simply add an item using, listOrderUser.add(<your_model_item>);
and after the for loop, do a notifyDataSetChanged(); on the recyclerView Adapter
TutorialsPoint
tutorialspoint.com › article › how-can-we-convert-a-json-array-to-a-list-using-jackson-in-java
How can we convert a JSON array to a list using Jackson in Java?
June 5, 2025 - import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; import java.util.List; import java.io.IOException; import java.util.ArrayList; public class JsonArrayToList{ public static void main(String[] args) { String jsonArray = "[{"name":"John","age":30},{"name":"Jane","age":25}]"; ObjectMapper objectMapper = new ObjectMapper(); try { List<Person> personList = objectMapper.readValue(jsonArray, new TypeReference<List<Person>>(){}); for (Person person : personList) { System.out.println("Name: " + person.getName() + ", Age: " + person.getAge()); } }
Top answer 1 of 6
321
Definitely the easiest way to do that is using Gson's default parsing function fromJson().
There is an implementation of this function suitable for when you need to deserialize into any ParameterizedType (e.g., any List), which is fromJson(JsonElement json, Type typeOfT).
In your case, you just need to get the Type of a List<String> and then parse the JSON array into that Type, like this:
import java.lang.reflect.Type;
import com.google.gson.reflect.TypeToken;
JsonElement yourJson = mapping.get("servers");
Type listType = new TypeToken<List<String>>() {}.getType();
List<String> yourList = new Gson().fromJson(yourJson, listType);
In your case yourJson is a JsonElement, but it could also be a String, any Reader or a JsonReader.
You may want to take a look at Gson API documentation.
2 of 6
19
Below code is using com.google.gson.JsonArray.
I have printed the number of element in list as well as the elements in List
import java.util.ArrayList;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class Test {
static String str = "{ "+
"\"client\":\"127.0.0.1\"," +
"\"servers\":[" +
" \"8.8.8.8\"," +
" \"8.8.4.4\"," +
" \"156.154.70.1\"," +
" \"156.154.71.1\" " +
" ]" +
"}";
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
JsonParser jsonParser = new JsonParser();
JsonObject jo = (JsonObject)jsonParser.parse(str);
JsonArray jsonArr = jo.getAsJsonArray("servers");
//jsonArr.
Gson googleJson = new Gson();
ArrayList jsonObjList = googleJson.fromJson(jsonArr, ArrayList.class);
System.out.println("List size is : "+jsonObjList.size());
System.out.println("List Elements are : "+jsonObjList.toString());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
OUTPUT
List size is : 4
List Elements are : [8.8.8.8, 8.8.4.4, 156.154.70.1, 156.154.71.1]
Rip Tutorial
riptutorial.com › jsonarray to java list (gson library)
Java Language Tutorial => JsonArray to Java List (Gson Library)
public ArrayList<String> ... matches the name of 'JsonArray' in your 'Json'. ArrayList<String> list = new Gson().fromJson(jsonList, listType); return list; }...