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));
}
}
Baeldung
baeldung.com › home › json › jackson › convert json array to java list
Convert JSON Array to Java List | Baeldung
August 13, 2025 - Then, we use the readValue() method of the ObjectMapper object to convert the JSON array String to a List. Similar to the assertion discussed previously, finally, we compare a specific field from the String JSON array to the jacksonList ...
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.
Google Groups
groups.google.com › g › vertx › c › 5fgz-e2rTbk
casting a JsonArray to a specific type
The Java 8 Stream API, in combination with lambdas, is so useful. ... Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message ... In case someone is interested, when it is a more complex type. JsonArray jarr = new JsonArray(messageAsyncResult.result().bodyAsString()); List<Customer> cl = (List<Customer>) jarr.getList().stream().map(s ->
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 ... System.out.println(p); } // 2. convert JSON array to List List<Person> person2 = mapper.readValue(jsonArray, new TypeReference<>() { }); person2.forEach(System.out::println); } } ... ...
Kodular
community.kodular.io › extensions › extension development
How to convert JSONArray to List? - Extension Development - Kodular Community
April 4, 2022 - I’m trying to create an extension based on an API, I’ve tried in several ways, but I’m not able to get the information that is inside each tag “name”. String genres = ""; JSONArray jsonArray = json.getJSONArray("genres"); genres = String.valueOf(jsonArray); Retorna : “genres”:[{“id”:878,“name”:“Ficção científica”},{“id”:28,“name”:“Ação”},{“id”:12,“name”:“Aventura”} I want it to return only the information that is inside the “name” Ficção científica Ação Aventura
BeginnersBook -
beginnersbook.com › home › java › 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\":37}, {\"name\":\"Rahul\", \"age\":34}]"; // Convert JSON array to JSONArray JSONArray jsonArray = new JSONArray(jsonArrayString); // Convert JSONArray to ArrayList ArrayList<JSONObject> arrayList = new ArrayList<>(); for (int ...
Java Code Geeks
javacodegeeks.com › home › core java
Converting JSON Array to Java List with Gson - Java Code Geeks
April 25, 2024 - String json = "[{\"name\":\"John\"},{\"name\":\"Doe\"}]"; JsonArray jsonArray = JsonParser.parseString(json).getAsJsonArray(); List<MyObject> list = new ArrayList<>(); for (JsonElement element : jsonArray) { MyObject obj = new Gson().fromJs...
How to do in Java
howtodoinjava.com › home › convert json array to list: gson, jackson and org.json
Convert JSON Array to List: Gson, Jackson and Org.json
September 25, 2023 - In Java, due to type erasure, the generic type information of collections (like List<T>) is not available at runtime. So Gson doesn’t know the exact type we want to deserialize to when dealing with generic types. The TypeToken class retains this information and acts as a workaround for the limitations of type erasure. List<Person> readPersonListFromJsonArray(String jsonArray) { //Use autowired bean in Spring / Spring Boot Gson gson = new Gson(); Type listType = new TypeToken<List<Person>>() {}.getType(); List<Person> personList = gson.fromJson(jsonArray, listType); return personList; }
Top answer 1 of 5
4
There are two problems with your code :
- First is that you are using a
getJsonArray()to get the array, which isn't part of Gson library, you need to use getAsJsonArray() method instead. - Second is that you are using
array.toString()which isn't obvious because for thefromJsonmethod you need ajsonArrayas parameter and notStringand that will cause you parse problems, just remove it.
And use the following code to convert your jsonArray to List<Noticia> :
Type type = new TypeToken<List<Noticia>>() {}.getType();
List<Noticia> lista = gson.fromJson(array, type);
And your whole code will be:
Gson gson = new Gson();
JSONArray array = obj.getAsJsonArray("result");
Type type = new TypeToken<List<Noticia>>() {}.getType();
List<Noticia> lista = gson.fromJson(array, type);
//testing - size = 2 but value Titulo is null
Log.i("LISTSIZE->", lista.size() +"");
for(Noticia n:lista){
Log.i("TITULO", n.getTitulo());
}
2 of 5
1
I think the problem could be something to do with toString() on JSONArray. But are you using obj.getAsJsonArray method?
Try this:
JSONArray arr = obj.getAsJsonArray("result");
Type listType = new TypeToken<List<Noticia>>() {
}.getType();
return new Gson().fromJson(arr , listType);
TutorialsPoint
tutorialspoint.com › 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?\\n
June 5, 2025 - Following is the code that provides an example of how to convert a JSON array to a list using Jackson in Java: 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 (Pe
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) );
}
Stack Abuse
stackabuse.com › converting-json-array-to-a-java-array-or-list
Convert JSON Array to a Java Array or List with Jackson
September 8, 2020 - In this tutorial, we'll use Jackson with Java to convert a JSON array into a Java array and a Java List with examples. This can be done from Strings or Files.
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 - Gson parses JSON arrays as members without difficulty if they are non-root objects. We can use the fromJson() method in the usual manner and it will parse the JSON array correctly to the required java array or list.
Tabnine
tabnine.com › home page › code › java › org.json.jsonarray
org.json.JSONArray.toList java code examples | Tabnine
public List<Long> getLongs(MappingDeclaration declaration) { if (!isLongs(declaration)) return null; Object obj = this.opt(declaration.getMapping().name()); boolean valid = obj instanceof JSONArray; assert valid; if (!valid) return null; return ((JSONArray) obj).toList().stream().map(o -> (long) o).collect(Collectors.toList()); } ... /** * Returns a java.util.Map containing all of the entries in this object.
Stleary
stleary.github.io › JSON-java › org › json › JSONArray.html
JSONArray
Write the contents of the JSONArray as JSON text to a writer. ... indentFactor > 0 and the JSONArray has only one element, then the array will be output on a single line: ... Warning: This method assumes that the data structure is acyclical. ... The writer. ... Returns a java.util.List containing all of the elements in this array.
Attacomsian
attacomsian.com › blog › jackson-convert-json-array-to-from-java-list
Convert JSON array to a list using Jackson in Java
November 6, 2022 - In this short tutorial, you'll learn how to use the Jackson library to convert a JSON array string into a list of Java Objects and vice versa.
Blogger
javarevisited.blogspot.com › 2013 › 04 › convert-json-array-to-string-array-list-java-from.html
How to Convert JSON array to String array in Java - GSon example
import org.apache.log4j.Logger; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; /** * Java program to convert JSON array to String array in Java or List. * * @author Javin Paul */ public class JsonArraytoJavaList { private static Logger logger = Logger.getLogger(JsonArraytoJavaList.class); public static void main(String args[]){ // Converting JSON String array to Java String array String jsonStringArray = "[\"JSON\",\"To\",\"Java\"]"; //creating Gson instance to convert JSON array to Java array Gson converter = new Gson(); Type type = new TypeToken<List<String>>(){}.getT
Coderanch
coderanch.com › t › 697439 › java › convert-JSON-Array-arraylist
how to convert JSON Array to arraylist (Java in General forum at Coderanch)
August 2, 2018 - 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.
Attacomsian
attacomsian.com › blog › gson-convert-json-array-to-from-java-list
Convert JSON Array to List using Gson in Java
October 14, 2022 - In this quick tutorial, you'll learn how to use the Gson library to convert a JSON array string into a list of Java Objects and vice versa.
MuleSoft
help.mulesoft.com › s › question › 0D52T00004mXPbwSAG › convert-json-array-to-java-list-of-objects
Convert json array to java list of objects
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