Explore the world of Java class reloading in this comprehensive 46-minute conference talk from Devoxx. Delve into various techniques, from HotSwap to agent-based reloading, and gain a thorough understanding of the available options for dynamic code updates in Java. Learn about the theory behind HotSwap, Dynamic Code Evolution VM, annotations, class loaders, and application servers. Discover the power of Java agents and witness practical demonstrations through examples. Whether you're a seasoned Java developer or just starting out, this talk provides valuable insights into enhancing your development workflow and improving application flexibility.