Complete Java Programming Masterclass

📚 Topics Covered

• What is Java? History, features, and platform independence
• Java ecosystem: JDK, JRE, JVM explained
• Write Once Run Anywhere (WORA) concept
• Java applications: Desktop, Web, Mobile (Android), Enterprise
• Installing JDK (Java 17 LTS or latest)
• Setting up development environment: IntelliJ IDEA, Eclipse, VS Code
• Understanding IDE features and shortcuts
• Your first Java program: Hello World
• Java program structure: class, main method
• Compiling and running Java programs

• Understanding bytecode and JVM
• Comments: single-line (//), multi-line (/* */), Javadoc (/** */)
• Java coding conventions and naming standards

📚 Topics Covered

• Variables: declaration, initialization, naming rules
• Primitive data types: byte, short, int, long, float, double, char, boolean
• Understanding type sizes and ranges
• Type casting: implicit (widening) and explicit (narrowing)
• Wrapper classes: Integer, Double, Character, Boolean, etc.
• Autoboxing and unboxing
• Literals: integer, floating-point, character, string, boolean
• Operators: arithmetic (+, -, *, /, %, ++, --)
• Relational operators: ==, !=, >, <, >=, <=
• Logical operators: &&, ||, !

• Assignment operators: =, +=, -=, *=, /=, %=
• Bitwise operators: &, |, ^, ~, <<, >>, >>>
• Ternary operator: ? :
• Operator precedence and associativity
• String basics: creation, concatenation, immutability

📚 Topics Covered

• Boolean expressions and conditions
• If statement: single condition execution
• If-else statement: two-way branching
• If-else-if ladder: multiple conditions
• Nested if statements
• Switch statement: multi-way branching
• Switch with fall-through and break
• Enhanced switch (Java 12+): arrow syntax, yield
• While loop: pre-tested loop
• Do-while loop: post-tested loop

• For loop: counter-based iteration
• Enhanced for loop (for-each): iterating arrays/collections
• Break statement: exit loop
• Continue statement: skip iteration
• Labeled break and continue
• Nested loops and loop patterns

📚 Topics Covered

• Methods: definition, purpose, and structure
• Method declaration: return type, name, parameters
• Method invocation and calling
• Parameters vs arguments
• Return statement and return values
• Method overloading: same name, different parameters
• Variable scope: local vs instance vs class
• Static methods vs instance methods
• Recursion: base case and recursive case
• Arrays: declaration, creation, initialization

• Array indexing and accessing elements
• Array length property
• Iterating arrays: for loop, enhanced for loop
• Multi-dimensional arrays (2D, 3D)
• Jagged arrays
• Arrays class utility methods
• Variable arguments (varargs)

📚 Topics Covered

• Object-Oriented Programming paradigm
• Classes: blueprint for objects
• Objects: instances of classes
• Class declaration and structure
• Instance variables (attributes/fields)
• Instance methods (behaviors)
• Creating objects with 'new' keyword
• Constructors: default and parameterized
• Constructor overloading
• this keyword: referencing current object

• Access modifiers: private, public, protected, default
• Encapsulation: data hiding principle
• Getters and setters (accessor and mutator methods)
• toString() method for object representation
• Object initialization blocks
• Static variables (class variables)
• Static methods and static blocks
• Static import

📚 Topics Covered

• Inheritance: IS-A relationship
• Extends keyword for inheritance
• Parent class (superclass) and child class (subclass)
• Inheriting fields and methods
• Method overriding: redefining parent methods
• @Override annotation
• super keyword: accessing parent class members
• super() for calling parent constructor
• Constructor chaining in inheritance
• Types of inheritance: single, multilevel, hierarchical

• Multiple inheritance limitation in Java
• Final keyword: final variables, methods, classes
• Polymorphism: compile-time and runtime
• Method overloading (compile-time polymorphism)
• Method overriding (runtime polymorphism)
• Dynamic method dispatch
• Upcasting and downcasting
• instanceof operator

📚 Topics Covered

• Abstraction: hiding implementation details
• Abstract classes with 'abstract' keyword
• Abstract methods: methods without body
• Concrete methods in abstract classes
• When to use abstract classes
• Interfaces: 100% abstraction (pre-Java 8)
• Interface declaration with 'interface' keyword
• Implementing interfaces with 'implements'
• Multiple interface implementation
• Interface variables: public static final

• Interface methods: public abstract
• Default methods in interfaces (Java 8+)
• Static methods in interfaces (Java 8+)
• Private methods in interfaces (Java 9+)
• Functional interfaces and @FunctionalInterface
• Marker interfaces
• Interface vs abstract class comparison
• Real-world abstraction examples

📚 Topics Covered

• String class: immutability and string pool
• String methods: length, charAt, substring, indexOf
• String comparison: equals, equalsIgnoreCase, compareTo
• String manipulation: concat, replace, trim, split
• String case methods: toUpperCase, toLowerCase
• StringBuilder class: mutable strings
• StringBuffer class: thread-safe mutable strings
• StringBuilder vs StringBuffer vs String
• String formatting: format(), printf()
• StringTokenizer class

• Regular expressions (regex) in Java
• Pattern and Matcher classes
• Regex patterns: character classes, quantifiers, groups
• Common regex operations: validation, search, replace
• Regex for email, phone, URL validation

📚 Topics Covered

• What are exceptions? Error vs Exception
• Exception hierarchy: Throwable, Error, Exception
• Checked exceptions vs unchecked exceptions
• Try-catch block for exception handling
• Multiple catch blocks
• Catch block order: specific to general
• Finally block: cleanup code
• Try-with-resources (Java 7+): automatic resource management
• Throw keyword: throwing exceptions manually
• Throws keyword: declaring exceptions

• Creating custom exceptions
• Custom checked and unchecked exceptions
• Exception chaining and cause
• Best practices for exception handling
• Common exceptions: NullPointerException, ArrayIndexOutOfBoundsException, etc.
• Rethrowing exceptions
• Multi-catch (Java 7+)

📚 Topics Covered

• Collections Framework overview and architecture
• Collection interface hierarchy
• List interface and implementations
• ArrayList: dynamic array implementation
• ArrayList methods: add, remove, get, set, size, clear
• LinkedList: doubly-linked list implementation
• ArrayList vs LinkedList performance comparison
• Vector and Stack (legacy classes)
• Set interface: unique elements
• HashSet: hash table implementation

• LinkedHashSet: insertion order maintenance
• TreeSet: sorted set using Red-Black tree
• Set operations and methods
• Iterator and ListIterator interfaces
• Enhanced for loop with collections
• Collections class utility methods

📚 Topics Covered

• Map interface: key-value pairs
• HashMap: hash table based map
• HashMap methods: put, get, remove, containsKey, keySet, values
• LinkedHashMap: insertion order maintenance
• TreeMap: sorted map using Red-Black tree
• Hashtable: legacy synchronized map
• HashMap vs Hashtable vs ConcurrentHashMap
• Queue interface: FIFO structure
• PriorityQueue: heap-based priority queue
• Deque interface: double-ended queue

• ArrayDeque implementation
• Comparable interface for natural ordering
• Comparator interface for custom ordering
• Sorting collections: Collections.sort()
• Searching collections: Collections.binarySearch()
• Generics in collections
• Type safety with generics

📚 Topics Covered

• Introduction to generics: type parameters
• Generic classes and interfaces
• Generic methods
• Bounded type parameters: extends, super
• Wildcards: ?, ? extends T, ? super T
• Generic constructors
• Type erasure in generics
• Restrictions on generics
• Generic collections usage
• Creating custom generic classes

• EnumSet and EnumMap
• Immutable collections (Java 9+)
• List.of(), Set.of(), Map.of()
• Collections performance comparison
• Time and space complexity of operations

📚 Topics Covered

• File handling in Java: File class
• Creating, deleting, renaming files and directories
• File properties: exists, length, canRead, canWrite
• Byte streams: InputStream, OutputStream
• FileInputStream and FileOutputStream
• Character streams: Reader, Writer
• FileReader and FileWriter
• Buffered streams: BufferedReader, BufferedWriter
• PrintWriter for formatted output
• Scanner for reading input

• NIO (New I/O) package: Path, Paths, Files
• Reading and writing with NIO
• Serialization: converting objects to bytes
• Serializable interface
• ObjectInputStream and ObjectOutputStream
• Transient keyword
• Externalizable interface for custom serialization

📚 Topics Covered

• Multithreading concepts: process vs thread
• Thread lifecycle: new, runnable, running, blocked, terminated
• Creating threads: extending Thread class
• Creating threads: implementing Runnable interface
• Thread class methods: start, run, sleep, join
• Thread priorities: setPriority, getPriority
• Daemon threads
• Thread synchronization: race condition problem
• Synchronized keyword: synchronized methods
• Synchronized blocks

• Inter-thread communication: wait, notify, notifyAll
• Deadlock and its prevention
• Thread safety and immutability
• ThreadLocal class
• Thread groups

📚 Topics Covered

• Executor framework: ExecutorService
• Thread pools: FixedThreadPool, CachedThreadPool
• Callable and Future interfaces
• CompletableFuture for async programming
• Concurrent collections: ConcurrentHashMap
• CopyOnWriteArrayList
• BlockingQueue and its implementations
• Atomic variables: AtomicInteger, AtomicLong
• Lock interface and ReentrantLock
• ReadWriteLock for read-write operations

• Semaphore for resource control
• CountDownLatch and CyclicBarrier
• Fork/Join framework
• Parallel streams (Java 8+)
• Best practices for concurrent programming

📚 Topics Covered

• Lambda expressions: syntax and usage
• Functional interfaces: Predicate, Function, Consumer, Supplier
• Method references: static, instance, constructor
• Streams API: creating streams
• Intermediate operations: filter, map, flatMap, sorted
• Terminal operations: collect, forEach, reduce
• Collectors class: toList, toSet, toMap, groupingBy
• Optional class: handling null values
• Date and Time API (java.time package)
• LocalDate, LocalTime, LocalDateTime

• ZonedDateTime and time zones
• Period and Duration
• Default and static methods in interfaces
• forEach method with lambda
• New features in Java 9-17: modules, var keyword, records, sealed classes

📚 Topics Covered

• Advanced OOP implementation
• Collections framework usage
• Exception handling throughout
• File-based persistence
• Multithreading for concurrent operations
• Modern Java features (lambdas, streams)

📚 Topics Covered

• Design patterns introduction and importance
• Gang of Four (GoF) patterns
• Pattern categories: creational, structural, behavioral
• Singleton pattern: one instance
• Factory pattern: object creation
• Abstract Factory pattern
• Builder pattern: complex object construction
• Prototype pattern: cloning objects
• When to use each creational pattern
• Anti-patterns to avoid

• Real-world pattern applications

📚 Topics Covered

• Adapter pattern: interface adaptation
• Decorator pattern: adding functionality
• Proxy pattern: placeholder object
• Facade pattern: simplified interface
• Composite pattern: tree structure
• Observer pattern: event handling
• Strategy pattern: algorithm selection
• Command pattern: encapsulating requests
• Template Method pattern
• State pattern: state-based behavior

• Chain of Responsibility pattern
• Iterator pattern (already in Collections)
• MVC pattern for applications

📚 Topics Covered

• Introduction to JDBC (Java Database Connectivity)
• JDBC architecture and drivers
• Driver types: Type 1, 2, 3, 4
• Loading JDBC driver
• Establishing database connection
• Connection interface and methods
• Statement interface for SQL execution
• PreparedStatement: parameterized queries
• CallableStatement: stored procedures
• ResultSet: processing query results

• CRUD operations with JDBC
• Transaction management: commit, rollback
• Batch processing
• Connection pooling
• Database metadata
• Handling SQL exceptions

📚 Topics Covered

• Introduction to testing: why test?
• Types of testing: unit, integration, system
• JUnit framework introduction
• JUnit 5 (Jupiter) architecture
• Test annotations: @Test, @BeforeEach, @AfterEach
• @BeforeAll, @AfterAll
• Assertions: assertEquals, assertTrue, assertNotNull
• assertThrows for exception testing
• Test lifecycle
• Parameterized tests

• Test suites
• Mocking with Mockito
• Test-Driven Development (TDD)
• Code coverage with JaCoCo
• Best practices for unit testing

📚 Topics Covered

• Build automation importance
• Maven: project management tool
• Maven project structure
• POM.xml configuration
• Maven lifecycle phases
• Dependency management with Maven
• Maven repositories: local, central, remote
• Gradle: modern build tool
• Gradle build scripts
• Gradle vs Maven comparison

• Git version control (review/deep dive)
• Git with Java projects
• GitHub collaboration
• .gitignore for Java projects
• CI/CD basics with GitHub Actions

📚 Topics Covered

• Web application architecture: client-server
• HTTP protocol: request-response cycle
• HTTP methods: GET, POST, PUT, DELETE
• Web servers vs application servers
• Apache Tomcat setup and configuration
• Servlets: server-side Java programs
• Servlet lifecycle: init, service, destroy
• HttpServlet class and methods
• doGet() and doPost() methods
• HttpServletRequest and HttpServletResponse

• Request parameters and headers
• Session management: HttpSession
• Cookies in servlets
• Request dispatcher: forward and include
• Servlet configuration: web.xml, annotations
• JSP (JavaServer Pages) introduction
• JSP lifecycle and implicit objects
• JSP directives, declarations, scriptlets, expressions

📚 Topics Covered

• Servlet filters: request/response filtering
• Filter chain and multiple filters
• Servlet listeners: lifecycle events
• ServletContext and application scope
• JSTL (JSP Standard Tag Library)
• EL (Expression Language) in JSP
• Custom JSP tags
• MVC architecture in web applications
• Front Controller pattern
• DAO (Data Access Object) pattern

• Connection pooling in web apps
• AJAX with servlets
• JSON response from servlets
• File download servlet
• Security in web applications
• Form-based authentication

📚 Topics Covered

• Introduction to Spring Framework
• Spring modules and architecture
• Dependency Injection (DI) concept
• Inversion of Control (IoC) principle
• Spring IoC container: BeanFactory, ApplicationContext
• Bean definition and configuration
• XML-based configuration
• Annotation-based configuration: @Component, @Autowired
• Java-based configuration: @Configuration, @Bean
• Bean scopes: singleton, prototype, request, session

• Bean lifecycle: init and destroy methods
• Autowiring: byName, byType, constructor
• @Qualifier for disambiguation
• Dependency injection: constructor, setter, field
• ApplicationContext events
• Spring Expression Language (SpEL)

📚 Topics Covered

• Introduction to Spring Boot
• Spring Boot advantages: convention over configuration
• Spring Initializr: project generation
• Spring Boot starters
• Auto-configuration mechanism
• Application.properties and application.yml
• Spring Boot main application class
• @SpringBootApplication annotation
• Component scanning
• Spring Boot DevTools

• Creating REST controllers with @RestController
• @RequestMapping, @GetMapping, @PostMapping
• Path variables and request parameters
• Request body with @RequestBody
• Response entity and HTTP status codes
• Exception handling with @ControllerAdvice
• Custom error responses

📚 Topics Covered

• JPA (Java Persistence API) introduction
• ORM (Object-Relational Mapping) concept
• Hibernate as JPA implementation
• Entity classes with @Entity annotation
• Primary keys: @Id, @GeneratedValue
• Column mapping: @Column annotation
• Table mapping: @Table annotation
• Entity relationships: @OneToOne, @OneToMany, @ManyToOne, @ManyToMany
• Cascade types and fetch types (LAZY, EAGER)
• Spring Data JPA repositories

• JpaRepository interface
• CRUD operations with repositories
• Query methods: findBy, findAll, save, delete
• Custom queries with @Query
• JPQL (Java Persistence Query Language)
• Native SQL queries
• Pagination and sorting

📚 Topics Covered

• Spring Security introduction
• Security filter chain
• Authentication vs authorization
• In-memory authentication
• JDBC authentication
• UserDetailsService for custom authentication
• Password encoding: BCryptPasswordEncoder
• Method-level security: @PreAuthorize, @Secured
• Role-based access control (RBAC)
• JWT (JSON Web Token) authentication

• Creating and validating JWT tokens
• Stateless authentication
• OAuth 2.0 basics
• Social login integration
• CORS configuration in Spring Boot
• CSRF protection

📚 Topics Covered

• Spring Boot Actuator: production-ready features
• Health checks and metrics
• Custom actuator endpoints
• Application monitoring
• Logging in Spring Boot: Logback, Log4j2
• Logging levels and configuration
• Aspect-Oriented Programming (AOP) in Spring
• @Aspect, @Before, @After, @Around
• Cross-cutting concerns: logging, transaction
• Transaction management: @Transactional

• Declarative vs programmatic transactions
• Caching with Spring: @Cacheable, @CacheEvict
• Redis integration for caching
• Scheduling tasks: @Scheduled
• Async processing: @Async
• Event handling in Spring
• Profiles for different environments

📚 Topics Covered

• REST API design principles
• Resource naming conventions
• HTTP status codes usage
• HATEOAS (Hypermedia as the Engine of Application State)
• API versioning strategies
• Request validation with @Valid
• Bean validation annotations
• API documentation with SpringDoc OpenAPI
• Swagger UI integration
• Rate limiting and throttling

• API security best practices
• Microservices architecture introduction
• Monolithic vs microservices
• Service discovery concept
• Inter-service communication
• Introduction to Spring Cloud

📚 Topics Covered

• RestTemplate for HTTP clients
• WebClient for reactive HTTP calls
• Consuming third-party APIs
• Feign client for declarative REST
• Email integration: JavaMailSender
• Sending HTML emails
• File upload and storage
• AWS S3 integration
• Message queues: RabbitMQ basics
• Apache Kafka introduction

• Event-driven architecture
• WebSocket support in Spring Boot
• Real-time communication
• Payment gateway integration (Stripe, Razorpay)
• SMS integration
• Push notifications

📚 Topics Covered

• Spring Boot testing overview
• @SpringBootTest annotation
• Test slicing: @WebMvcTest, @DataJpaTest
• MockMvc for testing controllers
• Mocking with @MockBean
• Testing REST APIs
• Integration testing with database
• TestContainers for database testing
• Testing security configurations
• Testing with different profiles

• JUnit 5 with Spring Boot
• AssertJ for fluent assertions
• Test coverage with JaCoCo
• Performance testing basics
• Contract testing introduction

📚 Topics Covered

• Relational database design principles
• Normalization: 1NF, 2NF, 3NF, BCNF
• Entity-Relationship diagrams
• Database schema design
• Index optimization in JPA
• Query optimization techniques
• N+1 query problem and solutions
• Database connection pooling: HikariCP
• Transaction isolation levels
• Optimistic vs pessimistic locking

• Database migration with Flyway/Liquibase
• NoSQL with Spring Boot: MongoDB
• Spring Data MongoDB
• Choosing SQL vs NoSQL
• Multi-database applications

📚 Topics Covered

• Packaging Spring Boot applications
• JAR vs WAR deployment
• Application properties for production
• Externalized configuration
• Environment-specific configurations
• Deploying to Tomcat server
• Docker basics review
• Dockerizing Spring Boot applications
• Docker Compose for multi-container
• Docker best practices for Java

• Cloud platforms: AWS, Azure, GCP
• Deploying to AWS Elastic Beanstalk
• Deploying to Heroku
• CI/CD for Spring Boot with Jenkins
• GitHub Actions for Java projects

📚 Topics Covered

• Application monitoring strategies
• Spring Boot Actuator deep dive
• Micrometer metrics
• Prometheus integration
• Grafana dashboards
• Distributed tracing with Sleuth and Zipkin
• Centralized logging with ELK stack
• Log aggregation strategies
• Performance profiling tools
• JVM monitoring and tuning

• Garbage collection optimization
• Memory leak detection
• Load testing with JMeter
• API performance optimization
• Database query profiling

📚 Topics Covered

• OWASP Top 10 for Java applications
• SQL injection prevention in JPA
• XSS (Cross-Site Scripting) prevention
• CSRF protection implementation
• Secure password handling
• Secrets management
• API key management
• Rate limiting implementation
• Input validation best practices
• Secure communication: HTTPS/TLS

• Security headers configuration
• Dependency vulnerability scanning
• Static code analysis: SonarQube
• Security testing
• Compliance: GDPR, PCI-DSS basics

📚 Topics Covered

• Full-stack application architecture
• Spring Boot backend development
• Database design and JPA
• REST API development
• Spring Security implementation
• Testing and quality assurance
• Docker deployment
• Production deployment

📚 Topics Covered

• Microservices architecture principles
• Monolithic vs microservices trade-offs
• When to use microservices
• Domain-Driven Design (DDD) basics
• Bounded contexts and aggregates
• Service decomposition strategies
• Database per service pattern
• API Gateway pattern
• Service registry and discovery
• Circuit breaker pattern

• Bulkhead pattern
• Retry and timeout patterns
• Event-driven architecture
• SAGA pattern for distributed transactions
• CQRS (Command Query Responsibility Segregation)

📚 Topics Covered

• Spring Cloud overview
• Service discovery with Eureka
• Eureka server and client setup
• Client-side load balancing with Ribbon
• Declarative REST client: Feign
• API Gateway with Spring Cloud Gateway
• Gateway routing and filters
• Distributed configuration: Spring Cloud Config
• Config server and client
• Refreshing configuration dynamically

• Circuit breaker with Resilience4j
• Fallback methods
• Distributed tracing with Sleuth
• Request correlation across services
• Service mesh basics

📚 Topics Covered

• Synchronous vs asynchronous communication
• REST for synchronous communication
• gRPC for high-performance RPC
• Protocol Buffers
• Message-driven architecture
• RabbitMQ: message broker
• Exchanges, queues, and bindings
• Spring AMQP for RabbitMQ
• Apache Kafka: distributed streaming
• Kafka topics, partitions, consumers, producers

• Spring Kafka integration
• Event sourcing pattern
• Message ordering and exactly-once delivery
• Dead letter queues
• Idempotency in distributed systems

📚 Topics Covered

• Database per service pattern
• Shared database anti-pattern
• Polyglot persistence
• Distributed transactions challenges
• Two-phase commit problems
• SAGA pattern: choreography vs orchestration
• Event-driven data management
• Change Data Capture (CDC)
• Database replication strategies
• Caching in microservices

• Redis for distributed caching
• Cache invalidation strategies
• API composition pattern
• CQRS with separate read/write models
• Eventual consistency

📚 Topics Covered

• Security in microservices
• Authentication and authorization in distributed systems
• OAuth 2.0 and OpenID Connect
• JWT for service-to-service auth
• API Gateway security
• Service-to-service authentication
• Secrets management: Vault
• Observability pillars: logs, metrics, traces
• Centralized logging with ELK
• Metrics with Prometheus and Grafana

• Distributed tracing with Jaeger
• Health checks and readiness probes
• Monitoring microservices
• Alerting and incident response

📚 Topics Covered

• Cloud-native principles
• 12-factor app methodology
• Containerization with Docker (deep dive)
• Multi-stage Docker builds for Java
• Docker image optimization
• Kubernetes introduction
• Kubernetes architecture
• Pods, Deployments, Services
• ConfigMaps and Secrets in K8s
• Persistent volumes

• Horizontal Pod Autoscaling
• Kubernetes for Spring Boot apps
• Helm charts for Java applications
• Service mesh: Istio basics
• Serverless Java: AWS Lambda

📚 Topics Covered

• AWS fundamentals review
• EC2 for Java applications
• AWS RDS for databases
• AWS S3 for object storage
• AWS Lambda with Java
• API Gateway with Lambda
• AWS ECS and Fargate
• AWS Elastic Beanstalk for Spring Boot
• AWS CloudFormation
• AWS SDK for Java

• DynamoDB with Java
• SQS and SNS messaging
• AWS monitoring: CloudWatch
• Azure and GCP alternatives
• Multi-cloud strategies

📚 Topics Covered

• DevOps culture and practices
• CI/CD pipeline design
• Jenkins for Java projects
• Jenkins pipeline as code
• GitLab CI/CD
• GitHub Actions for Java
• Building with Maven/Gradle in CI
• Automated testing in pipeline
• Code quality gates: SonarQube
• Security scanning: OWASP Dependency Check

• Container image scanning
• Deployment automation
• Blue-green deployments
• Canary releases
• Infrastructure as Code: Terraform

📚 Topics Covered

• System design fundamentals
• Scalability: horizontal vs vertical
• Load balancing strategies
• Caching layers and strategies
• CDN for static content
• Database sharding and partitioning
• Database replication
• CAP theorem
• Consistency models
• Message queues for decoupling

• Designing for high availability
• Disaster recovery planning
• Rate limiting and throttling
• API design best practices
• System design interview preparation
• Common system design problems

📚 Topics Covered

• Performance testing types
• JMeter for load testing
• Gatling for performance testing
• Performance metrics and KPIs
• Application profiling
• JVM profiling tools: JProfiler, YourKit
• Memory profiling and leak detection
• CPU profiling
• Database query optimization
• Caching strategies

• Connection pool tuning
• JVM tuning: heap size, GC
• Garbage collection algorithms
• Application optimization techniques
• Performance monitoring in production

📚 Topics Covered

• Reactive programming with Project Reactor
• Spring WebFlux for reactive applications
• Reactive streams and backpressure
• GraphQL with Spring Boot
• gRPC services in Java
• Apache Camel for integration
• Batch processing with Spring Batch
• Scheduled jobs with Quartz
• Search with Elasticsearch
• Caching with Hazelcast

• Blockchain basics with Java
• Machine Learning with Java: Weka, DL4J
• Android development basics (Java)
• Desktop applications: JavaFX

📚 Topics Covered

• Clean code principles
• SOLID principles in Java
• Code refactoring techniques
• Code smells and fixes
• Design patterns application
• Effective Java best practices
• Java coding standards
• Code review guidelines
• Technical debt management
• Documentation best practices

• Javadoc comments
• README and wiki writing
• Architecture documentation
• Static code analysis tools
• Continuous code quality

📚 Topics Covered

• Open source contribution guide
• Finding beginner-friendly projects
• Understanding project structure
• Reading contribution guidelines
• Forking and pull requests
• Code review in open source
• Building open source portfolio
• Starting your own open source project
• Documentation for open source
• Community management

• Licensing: Apache, MIT, GPL
• Building personal brand

📚 Topics Covered

• Java interview preparation strategy
• Core Java interview questions
• OOP interview questions
• Collections framework questions
• Multithreading interview topics
• Spring and Spring Boot questions
• Microservices interview prep
• System design interviews
• Data structures and algorithms review
• LeetCode problem-solving strategies

• Behavioral interview questions
• STAR method for answers
• Salary negotiation tactics
• Job search strategies
• Resume optimization for Java developers

📚 Topics Covered

• Project ideation and planning
• Requirement analysis
• System architecture design
• Microservices design
• Database design
• API design and documentation
• Technology stack selection
• Development workflow setup
• Sprint planning
• Agile methodology

📚 Topics Covered

• Implementation completion
• Comprehensive testing
• Performance optimization
• Security hardening
• Documentation writing
• Deployment to cloud
• CI/CD pipeline setup
• Monitoring and logging
• Load testing
• Project presentation preparation

📚 Topics Covered

• Professional portfolio website
• Resume optimization for Java roles
• LinkedIn profile enhancement
• GitHub profile showcase
• Technical blog writing
• Speaking at meetups/conferences
• Networking strategies
• Job application process
• Interview follow-up
• Continuous learning plan

• Staying updated with Java ecosystem
• Mentoring and teaching others
• Freelancing strategies
• Consulting career path
• Startup opportunities