JSON in Android

What is JSON? 

JSON (JavaScript Object Notation) is an independent data exchange format.
JSON is a very condense data exchange format.
Android includes the json.org libraries which allow to work easily with JSON files.
In JSON a data structure is a key / value pair.
The key is a string, the value can be a numerical or boolean or an object.
Lists are one or more values surrounded by [] and separated by ",".
An object is a set of key / name pairs which starts with "{" and ends with "}".
Binary values are not supported.
JSON is a subset of the JavaScript Specification (ECME-Script) and is therefore directly in JavaScript.

An example JSON might look like the following.

{
 firstName:'Lars',
 lastName:'Vogel',
 address: {
  street:'Examplestr.',
  number: '31'
 }
}