Master Java, Spring Boot, and System Design
The Smart Way
Explore Java Mastery
Java Basics
Master fundamentals from data types to exception handling
OOP Concepts
Deep dive into encapsulation, inheritance, and polymorphism
Collections Framework
Master List, Set, Map and their implementations
Java 8 Features
Lambda expressions, streams, and functional programming
Multithreading
Concurrency, locks, and executor service mastery
Spring Boot
Microservices, JPA, and enterprise-grade applications
System Design
Scale systems like Amazon, Netflix, and Swiggy
Interview Q&A
Crack top tech interviews with confidence
Coding Challenges
Practice problems for interview preparation
Latest YouTube Videos
Java 8 Streams Deep Dive
Learn functional programming with streams
Spring Boot Microservices
Build scalable cloud applications
System Design Interview
Design Netflix in 45 minutes
Java Basics
Build Your Java Foundation
Master core concepts with hands-on examples and clear explanations.
- • Data types and variables
- • Operators and expressions
- • Loops and control flow
- • Arrays and collections
- • Exception handling
Data Types
Primitive vs reference types
Operators
Arithmetic, logical, bitwise operations
Exception Handling
Try-catch, throws, custom exceptions
OOP
Master Object-Oriented Programming
Build scalable applications with proper OOP design patterns and principles.
Class & Object
Blueprints and instances
Encapsulation
Data hiding and security
Inheritance
Code reuse and extension
Polymorphism
Multiple forms, one interface
Real Examples
Build a complete banking system with OOP principles
Visual Diagrams
Clear class hierarchy and relationship charts
Interfaces
Contract-based design patterns
Collections Framework
Master Java Collections
Understand List, Set, Map with performance optimization and real-world usage.
List vs Set vs Map
When to use each collection type
ArrayList vs LinkedList
Performance trade-offs explained
HashMap Deep Dive
Internal working and complexity
Sorting with Comparator
Custom sorting strategies
Streams API
Functional collection operations
Performance Tips
Memory optimization techniques
Java 8
Write Modern Java Code
Master functional programming concepts that transformed Java development.
- ✓ Lambda Expressions
- ✓ Functional Interfaces
- ✓ Stream API
- ✓ Optional Class
- ✓ Method References
Stream API
Filter, map, reduce operations made simple
Lambda Expressions
Clean, concise functional code
Optional Class
Null safety best practices
Multithreading
Master Concurrent Programming
Build high-performance applications with proper thread management and synchronization.
- → Thread lifecycle and states
- → ExecutorService framework
- → Locks and synchronization
- → CompletableFuture async tasks
- → Deadlock prevention
ExecutorService
Thread pool management made easy
ReentrantLock
Advanced locking mechanisms
CompletableFuture
Async programming patterns
Spring Boot
Enterprise Java Made Simple
Build production-ready microservices with Spring Boot ecosystem.
- ✓REST Controllers and Services
- ✓JPA Repositories and Transactions
- ✓Security and Exception Handling
- ✓Kafka and RabbitMQ Integration
Microservices
Build scalable distributed systems
JPA & Security
Database operations and security
RESTful Services
Build production-ready APIs