Java Rest Clients
Java REST clients are libraries or tools that facilitate communication with RESTful web services using the HTTP protocol. They enable developers to make HTTP requests (such as GET, POST, PUT, DELETE) to interact with APIs, retrieve resources, and send data in a straightforward manner. Popular libraries for building Java REST clients include Java's built-in HttpURLConnection, Apache HttpClient, and JAX-RS Client API, which is part of the Java EE specification. Additionally, third-party frameworks like Spring RestTemplate and Spring WebClient offer more advanced features, including handling asynchronous calls and integrating with Spring applications. These clients typically support JSON and XML data formats for sending and receiving information, thereby making it easier to work with modern web services.
To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free
Message us for more information: +91 9987184296
1 - Introduction to REST: Understand the Representational State Transfer (REST) architectural style, which is commonly used in developing web services.
2) RESTful Services: Learn about RESTful services, key principles like statelessness, client server architecture, and the usage of standard HTTP methods (GET, POST, PUT, DELETE).
3) Java HTTP Client Overview: Get acquainted with the built in Java HTTP Client API introduced in Java 11, which replaces the older `HttpURLConnection`.
4) Creating HTTP Requests: Learn how to create various types of HTTP requests using the Java HTTP Client, including URI handling and setting request headers.
5) Handling Responses: Understand how to handle HTTP responses, including reading response bodies and status codes, and parsing response data.
6) Error Handling: Explore different methods for error handling in REST APIs, including how to manage HTTP error statuses and exceptions in Java.
7) Authentication: Study common authentication mechanisms used in REST APIs, such as Basic Auth and OAuth, and how to implement them in Java clients.
8) Serialization and Deserialization: Learn about converting Java objects to JSON (and vice versa) using libraries like Jackson or Gson, which is crucial for interacting with REST APIs.
9) Asynchronous Requests: Understand how to perform asynchronous HTTP requests using Java’s CompletableFuture, enabling non blocking operations.
10) Consuming JSON APIs: Dive into practical examples of consuming JSON APIs, using libraries like Jackson for mapping JSON data to Java objects.
11) Building a REST Client: Step by step guidance on building a simple REST client using Java, covering components from sending requests to processing responses.
12) Testing REST Clients: Learn how to test your REST clients effectively, using tools like Postman or writing unit tests with libraries such as JUnit and Mockito.
13) Error Response Handling: Knowing how to parse and handle error responses from REST APIs for better user experience and logging.
14) Rate Limiting: Understand the importance of rate limiting in REST API communication and how to implement it in Java clients to avoid being throttled by APIs.
15) Best Practices: Discuss best practices for developing robust REST clients, including connection management, timeout settings, and code organization.
16) Caching: Explore caching strategies for optimizing performance of REST clients, including HTTP caching headers and using local caches.
17) Using Third Party Libraries: A look into popular third party libraries like Apache HttpClient and OkHttp for advanced functionality and ease of use.
18) Advanced Topics: Consider topics like handling pagination, working with streaming data, and understanding WebSockets in relation to REST.
19) Project Work: Encourage students to implement a project where they create a full featured REST client that integrates with a public API, facilitating practical learning.
20) Conclusion and Resources: Summarize key takeaways and provide resources for further learning, such as documentation, books, and online courses related to Java REST clients.
This structured outline provides a comprehensive framework for training students on Java REST Clients, ensuring a thorough understanding of both foundational concepts and practical implementation.
Browse our course links : https://www.justacademy.co/all-courses
To Join our FREE DEMO Session: Click Here
Contact Us for more info:
I am learning flutter from JustAcademy, They provide very much great environment where people gather and work simultaneously. totally project based training institute.
Awesome Experience. I am a Front-end Web Designer working at Star India for 3 years now. I applied for Full-stack development and my experience has been phenomenal & they really do help with placements exceptionally. Thank you Roshan sir so much.
Flutter app monitoring with Prometheus and Grafana delivers real-time observability by instrumenting the app (via OpenTelemetry or lightweight exporters) to expose metrics that Prometheus scrapes and stores as time-series data. Grafana visualizes those metrics in customizable dashboards and triggers alerts, letting teams track CPU/memory, frame-render times, network latency, error rates and user-impacting regressions. This stack helps quickly detect performance problems, diagnose root causes, and continuously improve app stability and user experience.
Flutter CI with Codemagic is a cloud-first continuous integration and delivery solution that automates building, testing and releasing Flutter apps across iOS, Android and web using configurable workflows (codemagic.yaml), hosted macOS/Linux runners, dependency caching and parallelization. It integrates with GitHub/GitLab/Bitbucket, manages code signing and store publishing, runs unit/widget/integration tests, and generates reproducible artifacts so teams catch regressions early and ship reliably. For learners and professionals working on JustAcademy real-time projects, Codemagic removes the overhead of maintaining CI infrastructure, speeds iteration, and provides a repeatable pipeline for demonstrating and delivering polished app releases.
Using Flutter's Hot UI (hot reload and hot restart) lets developers inject code changes into a running app and see updated layouts, styles and behaviours instantly without losing app state, making it ideal for rapid prototyping. This real-time feedback loop accelerates iteration on widgets, animations and responsive designs, improves collaboration between designers and engineers, and dramatically shortens the path from idea to working MVP.
In 2025, pairing Flutter with Supabase vs Firebase means choosing between an open‑source, Postgres‑first backend and a mature Google serverless platform: Supabase gives Flutter apps SQL‑centric workflows, real‑time subscriptions, row‑level security and lower vendor lock‑in with predictable costs and direct SQL access, while Firebase offers Firestore, Auth, Functions, Analytics, polished SDKs, global scaling and turnkey managed features (offline sync, analytics, A/B testing). Both speed cross‑platform development and real‑time experiences; pick Supabase for relational control and openness, or Firebase for convenience and a broader managed ecosystem.
In 2025, Flutter and NativeScript are both mature cross-platform frameworks with different strengths: Flutter (Dart) compiles to native code and provides a rich, cohesive widget-driven UI, excellent performance, and consistent look across mobile, web and desktop, making it ideal for visually complex apps and teams that want a single expressive UI layer; NativeScript (TypeScript/JavaScript) maps directly to native UI components and gives seamless access to platform APIs, appealing to teams with strong JS/TS skills who need native look-and-feel and tight platform integration—choose Flutter for unified UI control and performance, NativeScript for native parity and easier reuse of web/JS expertise.
Flutter CI/CD with GitHub Actions is a complete tutorial-style guide that shows how to automate building, testing, signing, and deploying Flutter apps using GitHub’s workflow runner; it covers creating YAML workflows to run platform-specific builds (Android/iOS), caching dependencies, running unit/widget/integration tests, managing secrets and code signing, generating artifacts, and releasing to stores or distribution channels. By following the tutorial, developers and JustAcademy learners can enforce consistent quality, catch regressions early, speed up delivery of real-time projects, and adopt industry-standard DevOps practices that make app releases reproducible and reliable.
AI-generated UI in Flutter uses machine learning to convert design files or natural-language prompts into responsive Dart widgets, automating layout, styling, accessibility and cross-platform tweaks so prototypes and production-ready screens can be produced far faster with fewer manual edits; this streamlines collaboration between designers and developers, lets teams focus on business logic and performance, and—as models and tooling improve—will become a core part of development workflows, accelerating app delivery and hands-on learning for learners and professionals at JustAcademy.
Optimizing network calls in Flutter with Dio means using Dio’s rich HTTP client features—centralized configuration and interceptors for headers, auth, logging and error handling; request cancellation, timeouts and concurrency control; retry strategies (exponential backoff); and response caching/compression—to reduce latency, save bandwidth and improve reliability. By encapsulating API logic in a configured Dio instance, applying retries and backoff, caching frequent responses, and handling errors consistently, apps become faster, more resilient and easier to maintain—especially important for real-time project work and production-ready certifications like those at JustAcademy.
JustAcademy’s "Deploy Flutter to Firebase: A Step-by-Step Tutorial" is a concise guide that walks you through preparing a Flutter app, configuring Firebase services (Authentication, Firestore, Hosting), and using the Firebase CLI to build and deploy your app—covering both web hosting and integration for Android/iOS where relevant. It explains creating a Firebase project, adding platform-specific Firebase SDKs, adjusting app settings, running production builds, initializing Firebase Hosting, and performing the final deploy, with tips for testing and automating releases via CI/CD. By following the tutorial, developers get a practical, end-to-end workflow to ship scalable, real-time Flutter apps quickly and reliably.
Flutter Desktop keyboard shortcuts let you define and handle platform-consistent key bindings (like Ctrl/Cmd combinations) to trigger app commands without a mouse. Using Flutter’s Shortcuts, Actions, and Intents APIs (or lower-level RawKeyboard events), you map logical key sets to intent objects and implement actions that run when those intents are invoked, while respecting focus and accessibility so shortcuts work predictably across Windows, macOS, and Linux.
