“One of the Most Expensive Java Bugs Starts With ==” Most developers know: - == compares references - .equals() compares values But very few actually understand what’s happening inside JVM memory. In this video, I break down: - how the String Pool works - why "Hello" == "Hello" returns true - why new String("Hello") changes everything - how Java reuses references internally - and how this tiny mistake silently causes production bugs We’ll even visualize: - heap memory - pooled strings - object identity - and intern() behavior Once you understand this, concepts like: - HashMap internals - caching - immutability - Hibernate equality - and JVM optimizations Repository Article

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