Video narration
Does Java code really run directly on Windows, macOS, or Linux? Think of a game console. The same game instructions work on different hardware because each console provides an environment that understands them. Java follows a similar idea. You write Java source code. A compiler turns it into bytecode, shared instructions designed for a JVM. The turn: bytecode does not run directly on the operating system. The JVM, or Java Virtual Machine, is software that reads and runs it, handling platform-specific work underneath. So Windows, macOS, and Linux use different JVM implementations, like different consoles built for different hardware, while running the same game instructions. That is "write once, run anywhere"-a useful benefit, not a perfect promise. Platform-specific libraries can still matter. So, does Java run directly on every computer? No. The JVM is Java's software execution layer, letting one bytecode program travel across operating systems.