Whenever i want to connect to internet,i double click a connection icon(i created it earlier where username and password(for broadband) are stored) and click connect.The icon is in the network places(Windows XP)
May i know how to launch this connection from java or any other language? (I am asking this because my Internet Service Provider doesn't charge anything between 2 AM and 8AM :-) )
Creating a system task to run the program. You shouldn't need Java to execute a program on windows.
To use Scheduled Tasks in XP: http://support.microsoft.com/kb/308569
This is going to be unnecessarily difficult with Java, I believe. You'd have to write some native code to do the job for you, at which point you may as well write your whole program in C# or C++ anyway.
But, since you asked for a Java approach, you might want to look at the Robot class. It lets you move the mouse to a specific location on the screen, click, and otherwise automate the manual actions that you are doing. It's a very fragile solution.
Alternatively, if you can figure out what command the network connection shortcut is invoking, you can directly invoke it from Java using Runtime.exec.
(I don't really see why Java is good for this task, though.)
Related
I'm trying to find a developer to write a desktop program that has a pretty basic function. It will notify users, via some dialog (or alert) that some program is about to access the web cam. It could be skype or facetime, or whatever it is, the program should be aware of when the OS's camera is going to be accessed and notify the user. Yes, even if the user is initiating the camera themselves via Skype, the notification would still appear.
My question is this. If I need this program written in Java, is it possible? Obviously I am trying to get it done in Java so it would run on Windows and Mac.
If it is not possible, then it seems as though I'd have to write 2 separate programs on Windows and Mac.
I've come here to get suggestions so that I can connect with the right developers. If you have any suggestions, I'd be happy to hear them. Thanks!
No, you can't write this in Java. Whatever approach you take will be very system-specific (and will probably require enhanced privileges). You could write a JNI library and a Java interface, but it'd probably be about the same amount of trouble to write programs to the native UI libraries.
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.
Actually I am working on a java based application which has a functionality to turn off my system on a specific time and it's working fine but, the requirement says that if any application is open then it should not be close before turn off my system must have to close all the open application manually.
I am unable to find out the solution.
I have never tried this but it looks like you would have to use: Runtime.getRuntime().exec(). This seems to be a pretty good example of how to do this.
Java JNI
https://github.com/twall/jna/
Get the list of all processes via WinAPI and check for user_name in PEB of a process.
Or this http://msdn.microsoft.com/en-us/library/aa390460(v=vs.85).aspx :)
I have a Java program using AWT which I would like to run on a headless system. The display for the program does nothing other than display stats. When the program finishes, it exits. There is no user interaction on the display. The program creates an output file which I use in my build system.
Is there a way to get the Java program to run without an X11 display configured? Can I force Java to run the program without trying to display anything? I do not have access to the source code (it is just .jar file), so I can't make modifications to the source.
Any thoughts on how I could get this to work?
The underlying question here is how to run Java applications without an X server; providing a "fake" X server is only one option. In Java 1.4 and up, you can do the following:
java -Djava.awt.headless=true
This allows applications which use AWT to run on headless systems even without an X server.
Xvfb can do what you ask for. I've not used it myself, but here is a link to wikipedia: http://en.wikipedia.org/wiki/Xvfb
You can use a vncserver.
vncserver :1001
export DISPLAY=localhost:1001
java..
The added advantages is that you can actually view the gui
using vncserver 'just in case'
Could also run Xvnc in a low resolution and color depth.
As mentioned by Charles Duffy the traditional method is to tell Java to go headless.
Note that you can always mount the jar in Eclipse and use jad+jadclipse to see what it actually does, and perhaps even override a class if you need to by putting another class-file in "front" of it in the classpath.
A facility that might be relevant if the program uses Java2D is that newer Java versions use optimizations in the X11 server to render faster. This alone might be a reason to devote an X11 server attached to a high performance graphics card to your graphics processing.
I've used with great success in the past the PJA libraries, they don't seem to be maintained anymore, but then again, just just want to run...
I was able to get headless mode in OpenJFX with the command line arguments
-Dglass.platform=Monocle -Dmonocle.platform=Headless -Dprism.order=sw
I'm developing a Mac App in Java that logs into any one of our client's databases. My users want to have several copies of this program running so they can log into a couple clients at the same time, rather than logging out and logging back in.
How can I allow a user to open several copies of my App at once?
I'm using Eclipse to develop, and Jarbundler to make the app.
Edit: More Importantly, is there a way to do so in the code base, rather than have my user do something funky on their system? I'd rather just give them a 'Open New Window' menu item, then have them typing things into the Terminal.
You've probably already gotten enough code that you don't want to hear this, but you should really not be starting up two instances of the same application. There's a reason that you're finding it so difficult and that's because Apple doesn't want you to do it.
The OSX way of doing this is to use the Cocoa Document-based Application template in XCode. Apple Documentation: choosing a project.
This is something users are very accustomed to, and it works just fine. FTP programs, IRC clients, and many other types already use different "document" windows to point to different servers or channels. There's nothing inherently different about pointing to different databases.
Depending on how much code you've written, and how your application is designed, this may be pretty much impossible to implement without starting over. Developers who are encountering this problem during design phase, however, should definitely take Apple's advice.
From the Terminal, I can run
open -n -a appName.app
Then from Applescript, I can run
tell application "Terminal"
activaate
do script "open -n -a appName.app"
end tell
Then from Java, I can execute that script. Then, I can stuff that Java code into an Action. Then, stuff that action into a menu item that says "Open New Window".
That's what I'm going with for the moment. Now I just need to get the appName.
From the Terminal (or in a script wrapper):
/Applications/TextEdit.app/Contents/MacOS/TextEdit &
Something like that should work for you.
To do this in Java:
String[] cmd = { "/bin/sh", "-c", "[shell commmand goes here]" };
Process p = Runtime.getRuntime().exec (cmd);
If you are developing it in swing, you should just be able to instantiate the top Frame to create a new window.