JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Checkout for Promo Codes

How to create Json Object using Object Model?


This page shows how to create Json object using Object Model.

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

Java example to create json object:

package com.javaapi.json.examples;

import java.io.StringWriter;

import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.json.JsonWriter;

public class CreateJsonObjEx {

	public static void main(String a[]){
		
		JsonObjectBuilder jsonBuilder = Json.createObjectBuilder();
		jsonBuilder.add("emp_name", "Nataraj G");
		jsonBuilder.add("emp_id", 1016);
		jsonBuilder.add("salary", 20000);
		
		JsonObject empObj = jsonBuilder.build();
		// here we are writing to String writer. 
		// if you want you can write it to a file as well
		StringWriter strWtr = new StringWriter();
        JsonWriter jsonWtr = Json.createWriter(strWtr);
        jsonWtr.writeObject(empObj);
        jsonWtr.close();
        
        System.out.println(strWtr.toString());
	}
}

Output:
{"emp_name":"Nataraj G","emp_id":1016,"salary":20000}
<< Previous Program | Next 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
When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
Famous Quotations
Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon.
-- Susan Erz

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 © 2020 by Nataraja Gootooru. All Rights Reserved.