How do I start learning java?

I keep looking up tutorials, but everything presumes that I know a ton already about programming. I wanted a step by step interpretation of the Hello World app in a way that lets me know what those words do, and how they would be used in other java programs, not a thin explanation The most frustrating thing is that I do have some very basic programming knowledge, mainly in programming syntax. I've been trying to use the official Java Tutorials, but they're so vague.