React

useEffect and Fetching Data From a Real API

useEffect is how a component reaches outside itself — timers, subscriptions, and fetching data from a real backend.

React

Real Project: A Weather Dashboard That Talks to a Live API

A second real project: a small weather dashboard that searches a city and fetches live results from an external API.

Spring Boot

Building Your First REST API Endpoint

Create a simple GET endpoint that returns data, and understand controllers.

Spring Boot

Reading Request Data: Path Variables and Query Parameters

How to accept input from the URL in your Spring Boot endpoints.

Spring Boot

Accepting JSON with @RequestBody

Receive JSON data sent by clients and turn it into Java objects automatically.

Spring Boot

Handling Errors Gracefully in a REST API

Return clean, helpful error responses instead of ugly stack traces.