Not at all. 90% of all problems brought to be a solved by troubleshooting, because people are not intelligent.
There's a reason that the number 1 and number 2 questions with scripted "customer service" (Level 1) are interchangeable:
A). "Is it plugged in?"
and
B). "Is it turned on?"
The problem with many Level 1 scripts is that the next step usually reformats the hard drive and returns the system to it's "out-of-box" state including OS software god knows how many updates old and bloatware that the user only recently managed to remove from the system, all with no regard to the user's personal files and loaded software.
As far as the OP, regarding Java references, I prefer O'Reilly books. They tend to present the full command with the full set of arguments/options and also point out any differences between versions.
My Java books all date back to 1996, when I supported an OS/2 data center... Warp came out using Java as the language for it's UI and all desktop apps. I suppose I should take some time to brush up on and update my set.