core java and advanced java syllabus
Core Java refers to the fundamental concepts and features of the Java programming language, which include the basics of Java syntax, object-oriented programming principles (like inheritance, polymorphism, encapsulation, and abstraction), data types, control structures, exception handling, and the Java API (such as collections and I/O). The syllabus typically covers essential topics like Java environment setup, classes and objects, interfaces, and standard libraries. Advanced Java, on the other hand, builds on these foundations and delves into more complex areas such as Java EE (Enterprise Edition) technologies, including servlets, JSP (JavaServer Pages), JDBC (Java Database Connectivity), and frameworks like Spring and Hibernate. This part of the syllabus may also encompass concepts related to distributed systems, web services, microservices architecture, and design patterns, as well as topics in concurrency and performance tuning, aimed at developing robust enterprise-level applications.
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1 - Introduction to Java
Overview of Java history, features, and architecture (JVM, JRE, JDK).
2) Java Basics
Understanding Java syntax, keywords, data types, and operators.
3) Control Statements
Exploring conditional statements (if, switch) and loops (for, while, do while).
4) Object Oriented Programming (OOP) Concepts
In depth study of OOP principles: Encapsulation, Inheritance, Polymorphism, and Abstraction.
5) Classes and Objects
Defining classes, creating objects, and understanding constructors and the ‘this’ keyword.
6) Methods and Overloading
Defining methods, understanding method overloading, and passing parameters by value/reference.
7) Arrays and Strings
Working with single and multi dimensional arrays, and manipulating Strings using String and StringBuilder classes.
8) Exception Handling
Introduction to exceptions, try catch blocks, custom exceptions, and the importance of exception handling.
9) Java Collections Framework
Overview of Collections API, including List, Set, Map interfaces, and using classes like ArrayList, HashSet, and HashMap.
10) File I/O
Reading from and writing to files using Java I/O classes, understanding file streams, and serialization.
11) Multithreading
Introduction to threads, creating and managing threads, synchronization, and thread communication.
12) Java Networking
Basics of Java networking, using sockets for client server communication, and handling protocols like TCP/IP.
13) Java GUI Development
Overview of Java Swing and AWT for creating graphical user interfaces, building simple applications.
14) Java Database Connectivity (JDBC)
Connecting Java applications to databases, executing SQL commands, and handling results.
15) Java Annotations and Generics
Understanding annotations, their purpose, and the use of generics for type safety in collections.
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Java Interview Questions for 6 Years Experience 2024
Which is better Angular or React
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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.
