How to detect that i am already running a java program

hi
i am writing this java program. my problem is i don't
want to run more than one program at any time, so i
need a way to detect whether I am already running the program whenever I want to run the program.
Is there any way to do this in java ?
thanks for you help

Look at this thread:
http://forums.java.sun.com/thread.jsp?forum=31&thread=169912

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When I try to start Firefox, I get a message that it is already running but not responding and I can't run another Firefox at the same time. I uninstalled and reinstalled. No change. Tried various other suggestions. Help!!

When I try to start Firefox, I get a message that it is already running, but not responding and that I should close it before trying to run another Firefox. But I cannot find a way to close Firefox program that is not running as far as I can see. I tried uninstalling and reinstalling Firefox, but that did not work. I've tried various other things, but no luck. I thought programs should stop when the computer is turned off, but that didn't work either.

How are you opening the Profile Manager?
*http://kb.mozillazine.org/Profile_Manager
Sounds that Firefox is still or already running. 
See:
*http://kb.mozillazine.org/Kill_application

Firefox claims that it is already running and will not let me start a new session after closing out

I've been having this problem intermittently on both my Dell XPS 8000 and my HP nx7400 laptop. The Dell is running the latest version of Windows 7 Pro and the HP is running XP Pro (fully updated). After closing out of a Firefox session and running other apps, Firefox will not let me initiate another session, saying that "Firefox is already running... Please close the session..." That's not an exact quote, but you get the idea. CTRL-ALT-DEL and all other conventional means don't work and I am forced to reboot the system. This is a royal pain.. and I need some pain relief! Any suggestions? I may revert to an earlier version of Firefox until I see a solution... can't hurt, but I really like 4.0 and I don't look at going backwards as "progress."
Thanks.
Tom

Sounds like it is hanging when you exit and later try to restart Firefox.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
**Windows 7 Task Manager: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** http://kb.mozillazine.org/Firefox_hangs
** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
* You may need to try Firefox Safe Mode
** You may need to use '''Safe Mode''' to locate the problem:
***See: http://kb.mozillazine.org/Safe_Mode
***Firefox 4 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode.
***Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox.
****In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration.
****If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas
****When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode".
****Test to see if the problem you are experiencing is corrected.
*** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it
***#by enabling '''one at a time''' until the problem reappears.
***#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons.
***#'''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit).
***#You can use "Disable all add-ons" on the Safe Mode start window.
**See the following for more information
*** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
*** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
*** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting
 
 
'''You need to update the following.''' The Plugin version(s) shown below was/were submitted with your question and is/are out of date. You should update to avoid known security issues with the version(s) you have installed. Click on "More system info..." to the right of your question to see what was included with your question.
*Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
#'''''Check your plugin versions''''' on either of the following links':
#*http://www.mozilla.com/en-US/plugincheck/
#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#*There are plugin specific testing links available from this page:
#**http://kb.mozillazine.org/Testing_plugins
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
#*Java Test: http://www.java.com/en/download/help/testvm.xml

How to detect wether report was already totally loaded into CrystalReportViewer

Post Author: maxvor
CA Forum: Crystal Reports
I have a CrystalReportViewer component into wich i load my report. The report is big so it takes some time to load it. After loaidng i want to change statusbar text. How can I detect that report is already loaded? Can anyone help?

I might suggest reviewing Sun's Java tutorials.... there are some good ones for J2EE (servlet) technology, if you are at all confused about how to create a servlet or how they work.
The servlet will contain all of the viewer code you currently have in your JSP. You can either put it in the doGet method, or you can put it in a separate method and call it from doGet.
This ensures that the output stream and response writer are not opened or called any more than neccessary, and if they are you can control how they are used..... this being because in a servlet, you need to specify each time you want those objects to be used, whereas in a JSP page that is controlled by the application server.

When I click to open firefox it says that "firefox is already running but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system" and I've tried to shut down and restart my computer but it keeps

when i click to open firefox it says that "firefox is already running but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system." and I've tried to shut down and restart my computer but it keeps showing the same message. I've even uninstalled Firefox and then reinstalled in the hopes that the problem would be solved but it this message is still popping up. What can I do to solve this problem?
== This happened ==
Just once or twice
== I was on facebook trying to upload pictures yesterday. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; InfoPath.1)

Do you have a profile lock file in your profile folder? If so, delete it and see if TB runs properly:
http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

When I use a GSI external antenna for WiFi I first get a message that "Firefox is already running but not responding etc", and then Firefox crashes. Can anyone help please?

Because of weak WiFi signal I need to use an external antenna (GSI USB wireless WIFI long range network adapter). My computer can see the signal clearly and shows that I am connected to the right network. But when I try to launch Firefox I get a message that "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system." When I click "OK" Firefox tries to load websites but gives up and reports "Problem Loading". It looks like Firefox is having trouble "seeing" the signal from the external antenna. What do I need to do please?

Try Ubuntu support, I don't think your problem is with Firefox - it will use the connection that the Operating System "makes". I'm a real noob with Ubuntu myself, and don't think I can help you figure out the problem.
http://ubuntuforums.org/

I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". What do I need to do

I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". Rebooting my computer didn't help. Since I experienced that problem I also noticed that all my bookmarks which I had copied into the Windows Internet Explorer have also disappeared. I am using Firefox as my primary search engine and usually don't use Internet Explorer. I am running Windows 7 on my machine.

Try this add on [https://addons.mozilla.org/en-US/firefox/addon/open-profile-folder/ Open Profile Folder]

Ever since downloading and opening Firefox 4 beta, when I try to launch 3.6.8, I get an error message saying that Firefox is already running; it is not. I have removed 4.0 beta from the computer, but don't know where else to look for any bits and pieces.

I need to restart the computer in order to launch FF 3.6.8. Also, in Dreamweaver CS5, I have defined FF 3.6.8 as my default browser, but when I try to view a page in FF, I get the same message that FF is already running. Where else do I need to look to find hidden files that are causing this?

Did you uninstall the Firefox 4.0 beta version ?
If you did then did you remove the personal data or otherwise removed to Firefox profile folder ?
Make sure that you still have a (default) Firefox profile folder. 
See http://kb.mozillazine.org/Recovering_a_missing_profile

I am getting complaints from links that Firefox is already running and needs to be closed when it is not visibly running. But, I do find it as a process that IS running. What gives?

I click on a link in an E-mail. It complains that Firefox is already running and I must close it. Firefox is NOT visibly running. I check via Task Manager to verify. I find Firefox is running as a process. I kill the process and then can proceed. I did use Firefox earlier and closed it.

Make sure that you do not start Firefox with the -no-remote switch or have set the environment variable MOZ_NO_REMOTE=1 (Control Panel > System > Advanced > Environment variables).
If you need to have more than one profile open at the same time then start subsequent instances with the -no-remote command line switch. 
You can send links from other programs to a Firefox instance that is started with -no-remote, you need to drag links in a Firefox window in such cases.
See http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile

I can't get Firefox to start. It says that Firefox is already running after re-install and re-start it again. I have deleted all profiles, but no luck. HELP!

I can't get Firefox to start. It says that Firefox is already running after re-install and re-start it again. I have deleted all profiles, but no luck. HELP! edit

-> [[Firefox is already running but is not responding]]
-> Profile in use
* http://kb.mozillazine.org/Profile_in_use
Check and tell if its working.

How indesign detects that the images have been modified

Hello,
My problem is that all my images links are seen modified (yellow triangle) while the images don't have been modified.
The modified dates are the same.
All my images are on a unix server and indesign is used on Mac.
How indesign detects that the images have been modified ?

Thank you for your answer.
When you say the time stamp you talk about the modification date in the box link info ?
Because this date is the same on the image and in indesign and when I update the image this date doesn't change.
the only informations that change when I update the links are the import date and the state (modified become ok)

When I try to start Firefox, I get a message saying that Firefox is already running and cannot be re-started, so close down and reboot.

Following an upgrade of my OS from XP to Vista, I tried to point the new installation at my old profile. Now when I try to start FF, I get a message saying that it is already running and I should reboot to clear the problem. I've done that but the problem remains. I have uninstalled firefox and reinstalled v4 beta. The problem remains. Any ideas?

OK, I had moved the profile file inside the profile folder which was created when I installed FF, to the main FF folder. I then took the equivalent file which existed under XP before my upgrade to vista, and moved it into the new Profile folder. That's when I hit the problem described in the initial question.
So, what I did following Tony's response was to move the bookmarks password and cookies files into the profile created on the install. I then moved that file into the profile folder and moved the one I'd saved from XP, out to the main FF folder.
Started FF and voila! All working fine. Thanks for your help.

How can detect that cdrom drive were opened and closed?

How can detect that cdrom drive were opened and closed?

I'm sure there are more elegant and complicated ways to accomplish this using Windows SDK function calls to kernel32.dll or something extravagant like that, but if you want the bare-bones easy way to check if the CD-ROM tray is currently opened, then simply use System Exec to query the CD-ROM drive from the command line. One example of this is shown below.
Use the command line function cmd /c d:, where d: is your CD-ROM drive. If the Standard Error output from System Exec.vi is "The device is not ready." followed by a carraige return and line feed, then voila, your CD-ROM drive is open. If not, it's closed. Anyone have a better idea? I'm sure one exists...
Message Edited by Jarrod S. on 02-16-2006 12:23 PM
Jarrod S.
National Instruments
Attachments:
CDROM_Check.JPG ‏22 KB

URGENT: How to run a Java program from a different directory?

Hi.
How do I run a Java program from a directory that the file is not located in? So lets say im in c:\Java. But the file is in c:\Java\abc\efg\.
What would be the command to run the Java file from c:\Java.
I can't remember it and I need it asap.
Cheers.

If the class you are trying to run is MyApp.class, try
c:\Java\>java -cp abc\efg MyAppThe actual classpath you specify will depend on whether or not MyApp.class is in a package (I've assumed it isn't) and whether or not any 3rd party jars are involbed (I've assumed not).
Edited by: pbrockway2 on Apr 1, 2008 6:42 PM
The command arguments read as "Run the MyApp class using as a classpath abc\efg relative to here (c:\Java)".

How to run a java program without Java Compiler

I have a small project and I want share it with my friends but my friend'pc have not
Java compiler.
for example, I writen a application like YM, then 2cp can sent,receive messege. My cumputer run as Server, and my frien PC run as client.
How can my friend run it? or how to create an icon in dektop tu run a java program..??..
(sorry about my English but U still understand what i mean (:-:)) )

To run a program you don't need a Java compiler. Just the Java Runtime Engine. That can be downloaded from the Sun website and comes with an installer.
You could then turn your application into an executable jar file and start it somehow like jar myYM.
There is also software that packs a Java program into an executable file. I've never used that but one that comes to my mind is JexePack. It's for free if you can live with a copyright message popping up every time you start the program.
http://www.duckware.com/jexepack/index.html

How to detect that i am already running a java program

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