HTML, CSS, JAVASCRIPT, JSON , XML,

 A collection name _vlaue pairs an ordered lis of values

Start  and closing with {} start and closing []

{“name”: “java”, “ver”:”num”} [{“name”: “java”, “ver”:”num”},

{“name”: “php”, “ver”:”num”} }

Json rules 

1. Json file have .json as extension, ex. User.json

2. key/value pare {“key”:”value}

3. Double quotes “ “ ;

4. Value should be a valid JSON data type

5. Data is separated by comma (,)

6. Curly braces should object {....}

7. Square brackets hold arrays [ ] 

Gson is a Java library → Add Gson dependency