Tutorial by Examples

JSON (JavaScript Object Notation) syntax is based on a subset of JavaScript (see also json.org). A valid JSON expression can be one of the following data types simple data types: String, Number, Boolean, Null composite data types: Value, Object, Array Simple data types A JSON string has to ...

A JSON Object is surrounded by curly braces and contains key-value pairs. { "key1": "value1", "key2": "value2", ... } Keys must be valid strings, thus surrounded by double quotation marks. Values can be JSON objects, numbers, strings, arrays, or one of the...

Throughout this example it is assumed that the 'root' object that is being serialized to JSON is an instance of the following class : public class MyJson { }   Example 1 : An example of an instance of MyJson, as is: {} i.e. since the class has no fields, only curly brackets are serialized...

A JSON Array is an ordered collection of values. It is surrounded by square braces i.e [], and values are comma-delimited: { "colors" : [ "red", "green", "blue" ] } JSON Arrays can also contain any valid JSON element, including objects, as in this example ...

JSON is a very strict format (see http://json.org). That makes it easy to parse and write for machines but surprises humans when an inconspicuous mistakes breaks the document. Common Problems Trailing Comma Unlike most programming languages your are not allowed to add a trailing comma: { a: 1...

JSON arrays represent a collection of objects. In JS, theres a bunch of collection functions off of them such as slice, pop, push. Objects have just more raw data. A JSONArray is an ordered sequence of values. Its external text form is a string wrapped in square brackets with commas separating the ...