JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Publish Your Article Here

How to create Json Array using Streaming Model API?


This page shows how to create Json array object using Streaming API Model.

Note: Refer How to read Json data using JsonReader? page for dependent libraries.

Java example to create json array object using generator:

package com.javaapi.json.examples;

import java.io.StringWriter;

import javax.json.Json;
import javax.json.stream.JsonGenerator;

public class CreateJsonObjGenEx {

	public static void main(String a[]){
		
		StringWriter strWtr = new StringWriter();
		JsonGenerator jsonGen = Json.createGenerator(strWtr);
		JsonGenerator start = jsonGen.writeStartObject();
		start.write("emp_name", "Nataraj G");
		start.write("emp_id", 1016);
		start.write("salary", 20000);
		
		// create Json array with only values
		JsonGenerator plnArrGen = start.writeStartArray("direct_contacts");
		plnArrGen.write("Rakesh");
		plnArrGen.write("John");
		plnArrGen.writeEnd();
		
		// create an array of key-value pairs
		JsonGenerator kvArrGen = start.writeStartArray("contacts");
		// create each key-value pair as seperate object and add it to the array
		kvArrGen.writeStartObject().write("email", "[email protected]").writeEnd();
		kvArrGen.writeStartObject().write("mobile", "123123123123").writeEnd();
		kvArrGen.writeEnd();
		
		start.writeEnd();
		jsonGen.close();
		
		System.out.println(strWtr.toString());
	}
}

Output:
{
    "emp_name": "Nataraj G",
    "emp_id": 1016,
    "salary": 20000,
    "direct_contacts": [
        "Rakesh",
        "John"
    ],
    "contacts": [
        {
            "email": "[email protected]"
        },
        {
            "mobile": "123123123123"
        }
    ]
}
<< Previous Program 

Java API for JSON processing examples

  1. How to read Json data using JsonReader?
  2. How to read Json array data using JsonArray?
  3. How to create Json Object using Object Model?
  4. How to create Json Array using Object Model?
  5. How to create Json Object using Streaming Model API?
  6. How to create Json Array using Streaming Model API?
Knowledge Centre
doPost Vs doGet methods
doGet() method is used to get information, while doPost() method is used for posting information. doGet() requests can't send large amount of information and is limited to 240-255 characters. However, doPost()requests passes all of its data, of unlimited length. A doGet() request is appended to the request URL in a query string and this allows the exchange is visible to the client, whereas a doPost() request passes directly over the socket connection as part of its HTTP request body and the exchange are invisible to the client.
Famous Quotations
Good judgment comes from experience, and experience comes from bad judgment.
-- Barry LePatner

About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

Most Visited Pages

Other Interesting Sites

Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
Privacy Policy | Copyright © 2022 by Nataraja Gootooru. All Rights Reserved.