Hi,

     The below code is used for  generating JSON string. To generate JSON string we have to use "JSONGenerator " and "createGenerator(true)" method. Post this code in anonymous window and click on execute.

JSONGenerator gen = JSON.createGenerator(true);

gen.writeStartArray();

gen.writeStartObject();

gen.writenumberField('DeveloperNo.', 1);

gen.writeStringField('My Inspiration', 'Mohit');

gen.writeEndObject();

gen.writeEndArray();

String jsonString = gen.getAsString();

System.debug('jsonString:' + jsonString);

JSONParser parser = JSON.createParser(jsonString);

System.JSONToken token;

string text;

while ((token = parser.nextToken()) != null) {

system.debug('token value @@@' + token);

if ((token = parser.getCurrentToken()) != JSONToken.END_OBJECT) {

text = parser.getText();

system.debug('text value @@@' + text);

}

}

Some useful links for Understanding Json:

https://developer.salesforce.com/blogs/developer-relations/2011/09/hands-on-with-the-new-native-json-parser.html

Online Json Formater:

 https://jsonformatter.org/