Gson how to convert java object to from json

gson tutorial: converting java objects to/from json

gson, developed by google, is a powerful java library for serializing java objects into json (javascript object notation) and deserializing json into java objects. it's widely used due to its simplicity, flexibility, and ability to handle complex object structures. this tutorial will guide you through the fundamentals of gson, covering essential concepts and providing practical code examples.

**1. setting up gson**

before diving into code, you need to add the gson library to your project. there are two primary ways to do this:

**a) maven:**

**b) gradle:**

after adding the dependency, ensure you synchronize your project to download and include the gson library.

**2. basic serialization: java to json**

the core operation of gson is converting java objects into json strings. this process is known as *serialization*.

**a) simple object:**

let's start with a simple java class:

to serialize a `person` object to json:

**explanation:**

2. **`gson gson = new gson();`**: creates a `gson` object. this is the main object you'll use for serialization and deserialization.

**b) collections:**

gson can handle collections of java objects as well. for example, let's serialize a `list` of `person` objects:

**3. basic deserialization: json to java**

deserialization is the reverse process of serialization, where you convert a json string into a java object.

**a) simple object:**

using the same `person` class, let's deserialize th ...

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