How to create a JSON Array using Object Model in Java?



The javax.json.JsonArray interface can represent an immutable JSON array and provides an unmodifiable list view of the values in the array. A JsonArray object can be created by reading JSON data from an input source and also using a static method createArrayBuilder() of javax.json.Json class. We need to import the javax.json package (download javax.json-api.jar file) in order to execute it.

Syntax

public static JsonArrayBuilder createArrayBuilder()

Example

import java.io.*;
import javax.json.*;
import javax.json.JsonObjectBuilder;
public class JsonArrayTest {
   public static void main(String[] args) {
      JsonObjectBuilder builder = Json.createObjectBuilder();
      builder.add("Name", "Raja Ramesh");
      builder.add("Designation", "Java Developer");
      builder.add("Company", "TutorialsPoint");
      JsonArray contactInfo = Json.createArrayBuilder().add(Json.createObjectBuilder().add("email", "raja@gmail.com")).add(Json.createObjectBuilder().add("mobile", "9959984000")).build();
      builder.add("contactInfo", contactInfo);
      JsonObject data = builder.build();
      StringWriter sw = new StringWriter();
      JsonWriter jw = Json.createWriter(sw);
      jw.writeObject(data);
      jw.close();
      System.out.println(sw.toString());
   }
}

Output

{"Name":"Raja Ramesh","Designation":"Java Developer","Company":"TutorialsPoint",
"contactInfo":[{"email":"raja@gmail.com"},{"mobile":"9959984000"}]}

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