How can we convert a list to the JSON array in Java?

The JSON is a lightweight, text-based and language-independent data exchange format. The JSON can represent two structured types like objects and arrays. An object is an unordered collection of key/value pairs and an array is an ordered sequence of values.

We can convert a list to the JSON array using the JSONArray.toJSONString() method and it is a static method of JSONArray, it will convert a list to JSON text and the result is a JSON array.

Syntax

public static java.lang.String toJSONString(java.util.List list)

Example

import java.util.*;
import org.json.simple.*;
public class ConvertListToJSONArrayTest {
   public static void main(String[] args) {
      List<String> list = new ArrayList<String>();
      list.add("India");
      list.add("Australia");
      list.add("England");
      list.add("South Africa");
      list.add("West Indies");
      list.add("Newzealand");
      // this method converts a list to JSON Array
      String jsonStr = JSONArray.toJSONString(list);
      System.out.println(jsonStr);
   }
}

Output

["India","Australia","England","South Africa","West Indies","Newzealand"]