![Convert Java Object to JSON File in Java using Gson](https://simplesolution.dev/images/java-convert-java-object-to-json-file-using-gson.png)
Convert Java Object to JSON File in Java using Gson
In this Java Gson tutorial we learn how to use the Gson library to convert a Java object into JSON file using the Gson.toJson() method with FileWriter. Via different Java program examples we show you how to convert a JSON file from an object of HashMap, ArrayList, an object of a custom defined class or a List of objects.