Python
Java Multithreading & Concurrency Complete Guide
Learn Java multithreading and concurrency — threads, synchronization, ExecutorService and common patterns explained.
Free tutorials, coding problems, and online compilers. Python, Java, JavaScript, C++, Web Dev & more — all in one place for Pakistani students.
Most popular learning paths this month — sorted by views
Browse all topics — click any category to explore its tutorials
Free online compiler — write and run code directly in your browser. No installation needed. Choose any language and start immediately.
Top online tools sorted by popularity — free & no signup needed
Run Python, Java, C++, JS & 15+ languages in browser
Format, validate & explore JSON — 100% private
Live match highlighting, groups & replace mode
Encode & decode Base64 — supports file upload
Generate QR codes for URL, WiFi, email, SMS & more
HEX, RGB, HSL, CMYK conversions & shade palettes
Beautify & validate HTML5 with syntax highlighting
Beautify, minify & validate CSS instantly
Beautify JavaScript — K&R, Allman, Stroustrup styles
Write Markdown with live preview & toolbar
Validate email format, MX records & detect disposable
Query A, MX, NS, TXT, CNAME & all DNS record types
Domain registration, expiry & ownership information
Scan open TCP ports on any host or server
Format & beautify SQL — MySQL, PostgreSQL & T-SQL
Fresh tutorials published regularly — all free for Pakistani students
Python
Learn Java multithreading and concurrency — threads, synchronization, ExecutorService and common patterns explained.
Python
Build your first REST API with Spring Boot — setup, controllers, services, and database integration step by step.
Python
Master Java Streams API and lambda expressions for clean, functional-style programming in Java 8+.
Python
Learn Java exception handling with try-catch-finally blocks and how to create your own custom exception classes.
Python
Explore the Java Collections Framework — ArrayList, HashMap, LinkedList and more with practical code examples.
Python
Understand Java Object-Oriented Programming — classes, objects, inheritance, encapsulation and polymorphism explained with examples.
Python
Master Java control flow with if-else, switch statements, for and while loops using practical code examples.
Python
Learn Java variables, primitive data types, and operators with clear examples and code you can run yourself.
Python
Start learning Java in 2026 with this complete beginner's guide covering syntax, OOP, and core concepts with examples.
Python
Optimize VS Code: setup, best extensions, settings, and development workflow.
Python
Complete web development roadmap 2026: frontend, backend, and learning path.
Python
Design robust REST APIs: HTTP methods, status codes, versioning, and best practices.
Python
Advanced Linux: shell scripting, system administration, services, and automation.
Python
Essential Linux skills: terminal, commands, file system, permissions, and bash.
Python
Advanced Docker: Docker Compose, networking, volumes, and multi-container apps.
Python
Learn Docker: containers, images, Dockerfile, and containerization fundamentals.
Python
Advanced TypeScript: generics, decorators, utility types, and complex patterns.
Python
Introduction to TypeScript: types, interfaces, setup, and benefits over JavaScript.
Python
Use GitHub: pull requests, code reviews, collaboration, and open source workflow.
Python
Master Git branching: feature branches, merging, resolving conflicts, workflows.
Python
Learn Git: repositories, commits, branching, and fundamental version control.
Python
Master async programming in Node.js: callbacks, promises, and async/await patterns.
Python
Build REST APIs with Express: routing, middleware, requests, responses, and databases.
Python
Learn Node.js: runtime environment, modules, package management, and basics.
Python
Integrate APIs in React: fetching data, handling loading states, and error handling.