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.
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Mkyong
mkyong.com › home › java › how to parse json array with jackson
How to parse JSON Array with Jackson - Mkyong.com
April 23, 2024 - package com.mkyong.json.jackson; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.mkyong.json.model.Person; import java.util.Arrays; import java.util.List; public class JsonArrayToObjectExample2 { public static void main(String[] args) throws JsonProcessingException { List<Person> list = Arrays.asList( new Person("mkyong", 42), new Person("ah pig", 20) ); ObjectMapper mapper = new ObjectMapper(); String result = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(list); System.out.println(result); } }
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
Use the ObjectMapper class to read the JSON array and convert it to a list of objects.
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 - The following code parses a JSON array containing person data and converts it into a list of Java Person objects using the JSONArray and JSONObject classes.
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 to ArrayList: Let’s write the code to convert the JSON array to ArrayList. import org.json.JSONArray; import org.json.JSONObject; import java.util.ArrayList; public class JsonToArrayList { public static void main(String[] args) { // This is our JSON array contains name and age String jsonArrayString = "[{\"name\":\"Chaitanya\", \"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 i = 0; i < jsonArray.length(); i++) { arrayList.add(jsonArray.getJSONObject(i)); } // Print the ArrayList for (JSONObject obj : arrayList) { System.out.println(obj.toString()); } } }
Coderanch
coderanch.com › t › 697439 › java › convert-JSON-Array-arraylist
how to convert JSON Array to arraylist (Java in General forum at Coderanch)
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 - For the intrepid developer grappling with more intricate scenarios, the Java Reflection API proffers a potent toolset. Dynamically crafting a ParameterizedType encapsulating the List type with the desired element type affords unparalleled flexibility. To convert a JSON array to a List using ParameterizedType from the Java Reflection API, you need to follow these steps:
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 - List<Language> langList = new ArrayList(Arrays.asList(langs)); ... Check out our hands-on, practical guide to learning Git, with best-practices, industry-accepted standards, and included cheat sheet. Stop Googling Git commands and actually learn it! ... Language{name='Java', description='Java is a class-based, object-oriented programming language.'} Language{name='Python', description='Python is an interpreted, high-level and general-purpose programming language.'} Language{name='JS', description='JS is a programming language that conforms to the ECMAScript specification.'}
HowToDoInJava
howtodoinjava.com › home › gson › gson – parse json array to java array or list
Gson - Parse JSON Array to Java Array or List
April 3, 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.
Google Groups
groups.google.com › g › vertx › c › 5fgz-e2rTbk
casting a JsonArray to a specific type
Also, if you're using Java 8 you can make the List to List<String> conversion a little prettier with the stream API. Something like... List<String> list = array.toList().stream().collect(Collectors.mapping(value -> value.toString()), Collectors::toList); Might have that a little wrong since I typed that from my phone :-) On Dec 28, 2014, at 3:23 PM, Alexander Lehmann <alex...@gmail.com> wrote: I wonder if there is a smarter way to cast a JsonArray to a List of specific type.
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) );
}
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 - In Java, Jackson Type References provide a convenient way to handle generic types during JSON parsing. Since JSON arrays don’t carry type information, Jackson’s Type Reference helps us overcome this limitation by capturing the generic type at runtime. It enables us to directly convert a JSON array to a list without the need for manual type casting or intermediate steps.
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.
Tabnine
tabnine.com › home page › code › java › org.json.jsonarray
org.json.JSONArray.toList java code examples | Tabnine
* * @return a java.util.Map containing the entries of this object */ public Map<String, Object> toMap() { Map<String, Object> results = new HashMap<String, Object>(); for (Entry<String, Object> entry : this.map.entrySet()) { Object value; if (entry.getValue() == null || NULL.equals(entry.getValue())) { value = null; } else if (entry.getValue() instanceof JSONObject) { value = ((JSONObject) entry.getValue()).toMap(); } else if (entry.getValue() instanceof JSONArray) { value = ((JSONArray) entry.getValue()).toList(); } else { value = entry.getValue(); } results.put(entry.getKey(), value); } return results; } } ... /** * Returns a java.util.List containing all of the elements in this array.
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);
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
Medium
medium.com › @salvipriya97 › how-to-convert-json-array-to-java-pojo-using-jackson-367ac93f7b15
How to convert JSON array to Java POJO using Jackson | by Priya Salvi | Medium
June 18, 2024 - Main Class to Convert JSON to List of Person Objects: import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; import java.util.List; public class Main { public static void main(String[] args) { String jsonArray = "[{\"name\":\"John\", \"age\":30, \"address\":[{\"apartment\":\"A1\",\"street\":\"Main St\",\"pinCode\":\"12345\"}], \"unknownField\":\"value\"}, {\"name\":\"Alice\", \"age\":25, \"address\":[{\"apartment\":\"B2\",\"street\":\"Second St\",\"pinCode\":\"67890\"}]}]"; try { ObjectMapper objectMapper = new ObjectMapper(); List<Person> per
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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Attacomsian
attacomsian.com › blog › gson-convert-json-array-to-from-java-list
Convert JSON Array to List using Gson in Java
October 14, 2022 - Now we can use the fromJson() method from the Gson class to convert the above JSON array to a list of User objects: try { // JSON array String json = "[{\"name\":\"John Doe\",\"email\":\"john.doe@example.com\"," + "\"roles\":[\"Member\",\"A...