Month-1

Today we expanded our Library Management System with a reservation feature while deepening our understanding of Git workflows and modern Java features. The code changes from this session can be found here. Day 3 Summary Overview Started implementing a reservation system for the Library Management System while learning about Git workflows and exploring Java concepts. Environment & Tools Set up Git with proper .gitignore Created first feature branch for reservation system Learned IDE shortcuts for multiple cursor selection Concepts Covered Git Workflow Initial repository setup Multi-line commit messages Feature branching strategy IDE integration with Git Modern Java Features Records for immutable data (Reservation) Factory methods for object creation Compact constructors with validation Access level considerations in records Design Patterns & Principles Dependency Injection (constructor injection) Repository pattern continuation Interface design principles Factory method pattern Java Collections Queue interface and LinkedList implementation HashMap for efficient lookups Collection operations (offer vs add) Stream API for validation Implementation Progress Created Reservation record with validation Defined ReservationService interface Started InMemoryReservationService implementation Implemented reservation validation logic Key Takeaways Modern Java features support clean, maintainable code Interface design requires careful consideration of public API Validation should enforce business rules Dependency injection supports loose coupling Next Steps Ready to explore: ...

Today we focused on elevating our Library Management System to production-grade quality, with emphasis on proper domain modeling and clean architectural principles. The code changes from this session can be found here. Day 2 Summary Overview Restructured the Library Management System into a production-grade application with proper domain modeling, error handling, and service architecture. Environment & Architecture Organized codebase into clear packages: Domain entities Custom exceptions Service layer Utilities Concepts Covered Domain Modeling Refined core entities Introduced physical copy management Implemented repository pattern Separated immutable and mutable state Error Handling Created proper exception hierarchy Implemented state-based error handling Added descriptive error messages Collections and State Management Efficient storage structures Copy identification system Stream operations for data access Protected state transitions Design Patterns Repository Pattern Service Layer Interface segregation Immutable value objects Key Takeaways Clean architectural boundaries Robust error handling Type-safe operations Clear separation of concerns Next Steps Ready to explore: ...

Today marks the beginning of my practical Java journey with my AI mentor. We focused on setting up a proper development environment and dove straight into coding with modern Java features. The code changes from this session can be found here. Day 1 Summary Overview Started our Java learning journey with a focus on modern Java features and fundamental concepts while setting up the development environment. Environment Setup Installed OpenJDK (versions 17/21 discussed) Set up IntelliJ IDEA Community Edition Created first Java project Concepts Covered Modern Java Features Text blocks for multiline strings Records for immutable data classes Method references (:: operator) String formatting options Type inference with var Core Concepts Basic project structure Class creation and organization Object-oriented principles (encapsulation) String handling and formatting approaches Java’s reliability and type safety Practical Implementation Built a simple Library Management System demonstrating: ...