JSON Tutorial

What is JSON?

JSON stands for JavaScript Object Notation.

• It is a lightweight text-based data-interchange format.
• It is language and platform independent.
• It is a lightweight alternative to XML.
• It was invented by Douglas Crockford.

Note: JSON is mainly used for storing and exchanging data. The file extension for JSON is .json and Internet Media type is application/json.

JSON example:

{"students":[
    {"firstName":"Sandy", "lastName":"Sethi"},
    {"firstName":"Roxy", "lastName":"Malik"},
    {"firstName":"Sunil", "lastName":"Antil"}
]}

XML example:

< students>
    < student>
        Sandy
       Sethi
    </ student>
    < student>
        Roxy
        Malik
    </ student>
    < student>
        Sunil
        Antil
    </ student>
</ students>

Difference between JSON and XML:

1. JSON doesn’t use end tag. XML uses end tag.
2. JSON can use arrays. XML can’t use arrays.
3. JSON need only a standard JavaScript function to parse. XML needs XML parser to parse.

Java JSON tutorial:

• JSON data types
• Create json object from string
• Access json object array
• How to use JSON object in java?
• Parse json in java
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