You've installed Java. You've written your first "Hello World" class. Now comes the part that actually matters: turning that file into a running program. This is the full walkthrough — from a blank text file to a terminal output — so you know exactly what happens at every step.
Why Does This Matter?
Most tutorials skip the "how do I actually run this?" part. They show you the code and assume you'll figure out the rest. But understanding the end-to-end flow — writing, compiling, and executing — gives you a mental model that pays off for years. You'll know where errors come from, how to fix them, and how Java really works under the hood.
What You'll Need
A text editor (VS Code, Notepad++, or even Notepad)
