JSONObject example in Java

n the previous section of JSON tutorials you have seen how JSON can be used with JavaScript to create objects and arrays, you have also studied how to parse and create messages with JSON in JavaScript.

JSONObject example in Java

In the previous section of JSON tutorials you have seen how JSON can be used with JavaScript to create objects and arrays, youhave also studied how to parse and create messages with JSON in JavaScript. Nowin this part you will
study how to use JSON in Java.

To have functionality of JSON in java you must haveJSON-lib. JSON-lib also requires following "JAR" files:

commons-lang.jar 
commons-beanutils.jar
commons-collections.jar
commons-logging.jar
ezmorph.jar
json-lib-2.2.2-jdk15.jar
JSON-lib is a java library for that transforms beans,collections, maps, java arrays and XML to
JSON and then forretransforming them back to beans, collections, maps and others.

In this example we are going to use JSONObjectclass for creating an object of
JSONObject and then we will print theseobject value. For using
JSONObject class we have to import followingpackage "net.sf.json". To add elements in this object we haveused
put() method. Here is the full example code of

FirstJSONJava.java
isas follows:

FirstJSONJava.java

import net.sf.json.JSONObject; public class FirstJSONJava {   public static void main(String args[]){   JSONObject object=new JSONObject();  object.put("name","Amit Kumar");  object.put("Max.Marks",new Integer(100));  object.put("Min.Marks",new Double(40));  object.put("Scored",new Double(66.67));  object.put("nickname","Amit");  System.out.println(object);   } }

 

To run this example you have to follow these few stepsas follows:

Download JSON-lib jar and other supporting Jars
Add these jars to your classpath
create and save FirstJSONJava.java
Compile it and execute ,You  will get following output:

Output:

 

Download Source Code