Library-System

Today we dove deep into JVM architecture while transforming our Library Management System to embrace immutability. The code changes from this session can be found here. Day 7 Summary Overview Explored JVM architecture through our practical projects while evolving the Library Management System to use immutable records for state management. Environment & Tools Proper Java version management (OpenJDK 21) Git workflow Package structure and compilation JVM verbose class loading Concepts Covered JVM Architecture Class loading lifecycle Dynamic class loading patterns Memory management principles Garbage collection basics Immutability Patterns Record types for borrowing events State vs Event sourcing Clean separation of concerns Audit trail implementation System Evolution Removed mutable state from BookCopy Introduced BorrowingRecord Enhanced BorrowingService responsibilities Improved interface segregation Resource Management Proper datetime formatting String representation patterns Efficient optional handling History tracking implementation Implementation Progress Created immutable BorrowingRecord Updated BorrowingService for history tracking Simplified BookCopy class Enhanced system observability Improved separation of concerns Key Takeaways JVM’s efficient handling of immutable objects Benefits of event-sourced state management Clean separation of responsibilities Importance of proper version management Value of comprehensive audit trails 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: ...