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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

By : Ray Rischpater, Brian Ritchie
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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

1 (2)
By: Ray Rischpater, Brian Ritchie

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.
Table of Contents (12 chapters)
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11
Index

How to deserialize an object using gson for Java

Like Json.NET, gson provides a way to specify the destination class to which you're deserializing a JSON object. In fact, it's the same method you used in the recipe Reading and writing JSON in Java, in Chapter 1, Reading and Writing JSON on the Client.

Getting ready

You'll need to include the gson JAR file in your application, just as you would for any other external API.

How to do it…

You use the same method as you use for type-unsafe JSON parsing using gson using fromJson, except you pass the class object to gson as the second argument, like this:

// Assuming we have a class Record that looks like this:
/*
class Record {
  private String call;
  private float lat;
  private float lng;
    // public API would access these fields
}
*/

Gson gson = new com.google.gson.Gson(); 
String json = "{ \"call\": \"kf6gpe-9\", 
\"lat\": 21.9749, \"lng\": 159.3686 }";
Record result ...

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