1. Introduction

Converting a JSON object to a String in Java is a common task, especially when dealing with JSON formatted data. JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write. In this example, we are going to use the org.json library to demonstrate how to convert a JSON object to a String. If you don’t have this library in your project, you can add it via Maven or Gradle.

2. Program Steps

1. Add the dependency for the org.json library to your project.

2. Create a JSON object using the JSONObject class.

3. Convert the JSON object to a String using the toString() method.

4. Print the resulting String to the console.

3. Code Program

// Step 1: Importing necessary class
import org.json.JSONObject;

public class JsonToString {

    public static void main(String[] args) {
        // Step 2: Creating a JSON object
        JSONObject jsonObj = new JSONObject();
        jsonObj.put("name", "John");
        jsonObj.put("age", 30);
        jsonObj.put("city", "New York");

        // Step 3: Converting JSON object to String
        String jsonString = jsonObj.toString();

        // Step 4: Printing the resulting String to the console
        System.out.println(jsonString);
    }
}

Output:

{"city":"New York","age":30,"name":"John"}

4. Step By Step Explanation

– Step 1: The necessary class, JSONObject, from the org.json library is imported. This library needs to be added as a dependency to your project.

– Step 2: A JSON object jsonObj is created and populated with some key-value pairs.

– Step 3: The toString() method of the JSONObject class is used to convert the JSON object to a String.

– Step 4: The resulting String jsonString is printed to the console, showing the successful conversion of the JSON object to a String.