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Getting user input outside of App Class in IntelliJ IDEA

I'm trying to write a program that requires user input of a file path. Using the thread linked below (and setting VM options in Run-> Edit Configurations) I was able to get it to work when I asked for input in my App class. It does not work when I try to ask for input in my object that controls the flow of the rest of the program. I have a feeling it's pretty simple considering I'm already half way there but I couldn't find threads that address my specific issue.
Trying to read from the console in Java

How can I watch any particular file / directory based upon any file(located under specific directory if directory base watching) attempt for OPEN?

I want to execute few task based open targeted file's OPEN event.
For example, I am watching Sample.docx & whenever user will go for OPEN it, few subsequent task will be performed based upon it's OPEN action.
I have searched on internet & find out few solution but that are based upon file's MODIFICATION & DELETION operation. none of them shows based upon OPEN action which is actually I am looking for.
Any hint/suggestion would help me.
Thanks.

That is an operating-system specific functionality and is not something Java comes with out of the box. If you are on Windows you would use a FileSystemWatcher which exists in .NET, but if you need it in Java you would have to create native bindings if there isn't a library that already exists. Chances are this does not exist as not many people would have a valid use-case to do this and I don't think security people would be happy to see this either.

You could I suppose, in a specific thread, regularly poll currently running processes to see if the file name is contained within a process title.
As for .docx files for example, WORD would have this as its process title:
Sample.docx - Microsoft Word
You would need to utilize a JNA method named getAllWindowNames() to acquire a list of Window Names. This method works quite well. When Sample.docx is detected within the acquired list then start whatever file or files you like.
Keep in mind however, your Java application would need to always be running in the background and because of file association (as mentioned to you in a previous post) this technique would run the files you have associated with Sample.docx regardless of how the file was run (from a double-click in Windows Explorer, a shortcut on Desktop, opened from MS WORD itself, etc).
I have actually created a small demo application that does exactly what you are trying to accomplish however it is too large to post here. There is no tutorial that I know of for this sort of thing, it's just a matter of doing it....that is if the concept appeals to you.
Yes!...most people would not want this sort of thing dancing around on their System(s).

Controlling Process Name of my Jar

I wanted to know is there any way I could control the name the process my jar is starting, i.e,
I created a .jar file in java and whenever I am clicking on it, it is causing a process named javaw.exe and I want to control this name.
I want to do so because when I click on my jar file then if it already running it should stop and a new one should start, i.e., I want to run a new thread (process) everytime I click on it by stopping the previous one.
If I kill the process named javaw.exe, all processes with name javaw.exe would die (if I am running more than one program) . So, I need to change its name.
Plz help.
Thanks !

There's nothing wrong with javaw running. From the documentation:
The javaw command is identical to java, except that with javaw there is no associated console window. Use javaw when you don't want a command prompt window to appear. The javaw launcher will, however, display a dialog box with error information if a launch fails for some reason.
Ultimately, javaw runs your program without a console window. Changing that name could lead to some serious issues later, so you'd want to keep that particular program name.

Why reinvent the wheel? There are already standard ways to prevent two copies of the same program from running. Typically it involves creating a "flag" file, since filesystems guarantee that directory updates are atomic. On UNIX-like systems, the file would be /var/run/program-name.pid. If it already exists, then the second copy will exit with an error.

You could setup a controller process, that manages your instances:
First you try to connect to the controller on localhost via tcp/ip at a specific port (your programs "name" from now) and if sucessful, you send a message like 'new instance started' to that controller. If the connection was not sucessful, you start a new controller-thread in the current vm (and send the message again to this thread)
the controller loops, waiting for messages and if one matches 'new instance started', it does what you describe.
such a controller can be built easily using a simple ServerSocket, a small HTTP-server or many other messaging libs.

JAVA: Opening an application when the user starts their computer

I have an application which has a purpose to run when the user first runs their computer.
However, I'd like to make a check box on the app that enables/disables the application loading when the system is started. Is there any way to do this?
Thanks

I recommend you to create a service under windows. My suggestion is http://winrun4j.sourceforge.net/

This question has been discussed in SO time ago:
Code for Auto starting a java application on windows startup
Auto startup for java desktop application?
However, maybe the easier solution is to create a batch file,like suggested in the first link, to run your application as the user logs in.
If you want to enable/disable the startup through a checkbox, the first and simplest solution that comes to my mind is this: you can make a method, invoked by the checkbox listener, that edits the batch file and enables/disables the line used to run the application, in the batch file.
If you have Windows 7, read this tutorial.

Using a Java program I made on a Web Server

I created a small application that, when run, creates or updates some tables in a database by extracting data from some PDF files. Everything works fine in this desktop application, but the next step for me would be to make it possible for an administrator on a website to upload a PDF file and my Java program would then run and update the tables accordingly.
The problem is I have no idea where to start with this (the site isn't done yet, but I'm running some tests and it is going to be coded in PHP). I'd like to know what kind of technologies I need to let the server run the program and update everything as it would in the offline version. Sometimes it takes a while to update everything, so ideally, the user uploading the PDF could continue browsing other pages while the server does its job. (I'll probably implement something that when the server is done processing the file, it says if the program ended successfully or not in a log file)
Can someone tell me what terms to search for on Google or give me some pointers? I haven't chosen where my website is going to be hosted either, so if someone could tell me what to look for to know if they support running applications like this, I'd really appreciate it as well!
This could also apply to other programming languages as I know a bit of Python and C++ as well, so in the future I might have some applications in those languages I'll want to use on the web.
If I'm not approaching this the right way, I'm open to other suggestions, but the best solution would be to keep my Java program intact as I know it works exactly like I want it to and I'd rather not have to start it all over again.

If your host is *NIX based you can use crontab (Automatic Task Scheduler) to run your program at set intervals. Make it check if a "new" PDF exists, and run the program if there is. There may be a way to use Windows Task Scheduler type programs to do it on Windows. This is probably the easiest way.
Alternately you can use You can use shell_exec() in your php to execute a command on your *NIX system directly to run your java program.