If you’ve worked with Java or any JVM-based language (Kotlin, Scala, Groovy) in 2026, you’ve almost certainly encountered acronyms like JVM, JRE, JDK, and GraalVM. But mixing up these components isn’t just a beginner mistake: it can lead to 2x higher cloud bills, 10x slower serverless cold starts, and avoidable production outages. Even senior devs...