📚 Main Topics

1. Introduction to REST API

   • Explanation of how REST APIs work, including fetching and sending data.
   • Overview of HTTP methods: GET, POST, PUT, DELETE.

2. Using Postman for API Testing

   • Introduction to Postman as a tool for testing APIs.
   • How to send GET and POST requests using Postman.

3. CRUD Operations

   • Explanation of CRUD operations: Create, Read, Update, Delete.
   • Mapping HTTP methods to CRUD operations.

4. Handling Responses and Status Codes

   • Understanding HTTP status codes (200, 404, etc.).
   • How to interpret responses from the server.

5. Implementing API Endpoints

   • Creating endpoints to fetch a list of products and individual products by ID.
   • Adding new products to the list.

6. Error Handling and Debugging

   • Common errors encountered while working with APIs.
   • Techniques for debugging and resolving issues.

✨ Key Takeaways

• REST APIs use HTTP methods to perform operations on resources.
• Postman is a powerful tool for testing and interacting with APIs.
• Understanding status codes is crucial for diagnosing issues with API requests.
• CRUD operations are fundamental to working with data in APIs.
• Properly mapping endpoints and handling requests/responses is essential for API functionality.

🧠 Lessons Learned

• API DevelopmentFamiliarity with RESTful principles and HTTP methods is essential for developing and consuming APIs.
• Postman UsageLearning to use Postman effectively can streamline the process of testing and debugging APIs.
• Error ManagementBeing able to handle and debug errors is a critical skill in API development.
• Dynamic EndpointsUsing path variables allows for more flexible and dynamic API endpoints.
• Data HandlingUnderstanding how to convert between JSON and Java objects is important for data interchange in APIs.