How do I make a JSON object with multiple arrays

Question

I ve never used JSON before so I m not familiar with its syntax   At the moment I have multiple arrays containing different pieces of data   I would like to create one JSON object  that contains the multiple arrays each with several pieces of data   E g   An object called cars  containing multiple arrays each for a different make of car  In each array would be the model of car along with some other types of data e g  number of doors  doesn t really matter its just a fictional example    It would be greatly appreciated if someone explained the syntax with an example

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A good book I m reading  Professional JavaScript for Web Developers by Nicholas C  Zakas 3rd Edition has the following information regarding JSON Syntax       JSON Syntax allows the representation of three types of values      Regarding the one you re interested in  Arrays it says       Arrays are represented in JSON using array literal notation from JavaScript  For example  this is an array in JavaScript    var values    25   hi   true        You can represent this same array in JSON using a similar syntax     25   hi   true       Note the absence of a variable or a semicolon  Arrays and objects can be used together to represent more complex collections of data  such as           books                                                          title    Professional JavaScript                        authors                              Nicholas C  Zakas                                              edition   3                       year   2011                                                           title    Professional JavaScript                        authors                              Nicholas C Zakas                                              edition   2                       year   2009                                                           title    Professional Ajax                        authors                              Nicholas C  Zakas                            Jeremy McPeak                            Joe Fawcett                                              edition   2                       year   2008                                          This Array contains a number of objects representing books  Each object has several keys  one of which is  authors   which is another array  Objects and arrays are typically top-level parts of a JSON data structure  even though this is not required  and can be used to create a large number of data structures     To serialize  convert  a JavaScript object into a JSON string you can use the JSON object stringify   method  For the example from Mark Linus answer   var cars          color   gray       model   1       nOfDoors  4                  color   yellow       model   2       nOfDoors  4       cars is now a JavaScript object  To convert it into a JSON object you could do   var jsonCars   JSON stringify cars     Which yields       color   gray   model   1   nOfDoors  4    color   yellow   model   2   nOfDoors  4      To do the opposite  convert a JSON object into a JavaScript object  this is called parsing   you would use the parse   method  Search for those terms if you need more information    or get the book  it has many examples

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Another example                             id  1           deviceId  1           typeOfDevice   1            state   1            assigned  true                          id  2           deviceId  3           typeOfDevice   3            state   Excelent            assigned  true                          id  3           deviceId  4           typeOfDevice   j    una            state   Excelent            assigned  true                          id  4           deviceId  5           typeOfDevice   nffjnff            state   Regular            assigned  true                          id  5           deviceId  6           typeOfDevice   44            state   Excelent            assigned  true                          id  6           deviceId  7           typeOfDevice   rr            state   Excelent            assigned  true                          id  7           deviceId  8           typeOfDevice   j            state   Excelent            assigned  true                          id  8           deviceId  9           typeOfDevice   55            state   Excelent            assigned  true                          id  9           deviceId  10           typeOfDevice   5            state   Excelent            assigned  true                          id  10           deviceId  11           typeOfDevice   5            state   Excelent            assigned  true          1     Read the array s    each data 0   function i  item             data 0  i  deviceId   data 0  i  typeOfDevice    data 0  i  state    data 0  i  assigned              Use http   www jsoneditoronline org  to understand the JSON code better

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Using below method pass any value which is any array   Input parameter  url  like  Example    node  any int value of array  anyKeyWhichInArray  Example   cars Nissan  0  model   It can be used for any response       public String getResponseParameterThroughUrl Response r  String url  throws JsonProcessingException  IOException       String value           String   xpathOrder   url split           ObjectMapper objectMapper   new ObjectMapper        String responseData   r getBody   asString               JSONObject jsonObject   new JSONObject responseData       byte   jsonData   jsonObject toString   getBytes        JsonNode rootNode   objectMapper readTree jsonData       JsonNode node   null      for int i 1 i lt xpathOrder length i              if node  null              node   rootNode          if xpathOrder i  contains                    xpathOrder i    xpathOrder i  replace                       xpathOrder i    xpathOrder i  replace                       node   node get Integer parseInt xpathOrder i                       else             node   node path xpathOrder i              value   node asText        return value

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var cars         manufacturer                          color   gray               model   1               nOfDoors  4                                  color   yellow               model   2               nOfDoors  4

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Enclosed in    represents an object  enclosed in    represents an array  there can be multiple objects in the array example object          quot brand quot    quot bwm quot         quot price quot   30000            quot brand quot    quot benz quot         quot price quot   50000    example array                   quot brand quot    quot bwm quot             quot price quot   30000                        quot brand quot    quot benz quot             quot price quot   50000          In order to use JSON more beautifully  you can go here JSON Viewer do format

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On the outermost level  a JSON object starts with a   and end with a     Sample data          cars              Nissan                   model   Sentra    doors  4                 model   Maxima    doors  4                 model   Skyline    doors  2                      Ford                   model   Taurus    doors  4                 model   Escort    doors  4                      If the JSON is assigned to a variable called data  then accessing it would be like the following   data cars  Nissan   0  model      Sentra data cars  Nissan   1  model      Maxima data cars  Nissan   2  doors      2  for  var make in data cars        for  var i   0  i  lt  data cars make  length  i              var model   data cars make  i  model          var doors   data cars make  i  doors          alert make          model          doors             Another approach  using an associative array for car models rather than an indexed array           cars              Nissan                  Sentra     doors  4   transmission   automatic                 Maxima     doors  4   transmission   automatic                       Ford                  Taurus     doors  4   transmission   automatic                 Escort     doors  4   transmission   automatic                      data cars  Nissan    Sentra   doors      4 data cars  Nissan    Maxima   doors      4 data cars  Nissan    Maxima   transmission      automatic  for  var make in data cars        for  var model in data cars make             var doors   data cars make  model  doors          alert make          model          doors             Edit   Correction  A JSON object starts with   and ends with    but it s also valid to have a JSON array  on the outermost level   that starts with   and ends with     Also  significant syntax errors in the original JSON data have been corrected  All key names in a JSON object must be in double quotes  and all string values in a JSON object or a JSON array must be in double quotes as well   See    JSON specification JSONLint - The JSON validator

[json] How do I make a JSON object with multiple arrays?

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