Git

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: ...