Difference between JSONObject and JSONArray

Question

After having a short look at Google I found this link that describes the difference  yet from a syntax point of view   When would one be preferred over the other in a programming scenario

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The difference is the same as a  Hash Map vs List   JSONObject    Contains named values  key- value pairs  tuples or whatever you want to call them    like  ID   1   Order of elements is not important   a JSONObject of  id  1  name   B   is equal to  name   B   id  1       JSONArray    Contains only series values   like  1   value    Order of values is important   array of  1  value   is not the same as   value  1       Example  JSON Object -- gt            JSON Array -- gt               employees          firstName   John    lastName   Doe          firstName   Anna    lastName   Smith          firstName   Peter    lastName   Jones

User · Answer

Best programmatically Understanding   when syntax is   then this is JsonObject when syntax is    then this is JsonArray  A JSONObject is a JSON-like object that can be represented as an element in the JSONArray  JSONArray can contain a  or many  JSONObject Hope this will helpful to you

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I know  all of the previous answers are insightful to your question  I had too like you this confusion just one minute before finding this SO thread  After reading some of the answers  here is what I get  A JSONObject is a JSON-like object that can be represented as an element in the array  the JSONArray  In other words  a JSONArray can contain a  or many  JSONObject

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When you are working with JSON data in Android  you would use JSONArray to parse JSON which starts with the array brackets   Arrays in JSON are used to organize a collection of related items  Which could be JSON objects   For example     name   item 1     name    item2     On the other hand  you would use JSONObject when dealing with JSON that begins with curly braces   A JSON object is typically used to contain key value pairs related to one item  For example    name    item1    description   a JSON object    Of course  JSON arrays and objects may be nested inside one another   One common example of this is an API which returns a JSON object containing some metadata alongside an array of the items matching your query     startIndex   0   data      name   item 1     name    item2

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To understand it in a easier way  following are the diffrences between JSON object and JSON array   Link to Tabular Difference    https   i stack imgur com GIqI9 png  JSON Array  1  Arrays in JSON are used to organize a collection of related items     Which could be JSON objects  2   Array values must be of type string  number  object  array  boolean or null 3   Syntax                 Ford    BMW    Fiat    4   JSON arrays are surrounded by square brackets            Tip to remember       Here  order of element is important  That means you have      to go straight like the shape of the bracket i e  straight lines       Note  It is just my logic to remember the shape of both    5   Order of elements is important  Example     Ford   BMW   Fiat   is not      equal to   Fiat   BMW   Ford   6   JSON can store nested Arrays that are passed as a value    JSON Object  1   JSON objects are written in key value pairs  2   Keys must be strings  and values must be a valid JSON data type  string  number       object  array  boolean or null  Keys and values are separated by a colon      Each key value pair is separated by a comma  3   Syntax              name   Somya    age  25   car  null   4   JSON objects are surrounded by curly braces         Tip to remember   Here  order of element is not important  That means you can go      the way you like  Therefore the shape of the braces i e  wavy        Note   It is just my logic to remember the shape of both   5   Order of elements is not important       Example     rollno  1  firstname   Somya                       is equal to                 firstname   Somya   rollno  1  6   JSON can store nested objects in JSON format in addition to nested arrays

User · Answer

When a JSON start s with    it is a ObjectJSON object and when it start s with    it is an Array JOSN Array  An JSON array can consist of a many objects and that is called an array of objects

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The usage of both can be depended on the structure of your data  Simply  You can use the Nested Objects approach if you plan to give priority to a unique identifier such as a Primary Key  eg            quot Employees quot                  quot 001 quot                      quot Name quot     quot Alan quot                   quot Children quot      quot Walker quot    quot Dua quot    quot Lipa quot                                  quot 002 quot                      quot Name quot     quot Ezio quot                   quot Children quot      quot Kenvey quot    quot Connor quot    quot Edward quot                              Or  Use the Array first approach if you intend to store a set of values with no need to identify uniquely  eg                     quot Employees quot                                         quot Name quot     quot Alan quot                       quot Children quot      quot Walker quot    quot Dua quot    quot Lipa quot                                                          quot Name quot     quot Ezio quot                       quot Children quot      quot Kenvey quot    quot Connor quot    quot Edward quot                                               Although you could use the second method with an identifier  it can be harder or too complex to query and understand in some scenarios  Also depending on the database one may have to apply a suitable approach  Eg  MongoDB   Firebase

User · Answer

I always use object  it is more easily extendable  JSON array is not  For example you originally had some data as a json array  then you needed to add a status header on it you d be a bit stuck  unless you d nested the data in an object  The only disadvantage is a slight increase in complexity of creation   parsing   So instead of    datum0  datum1  datumN    You d have    data   datum0  datum1  datumN     then later you can add more      status   foo   data   datum0  datum1  datumN

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