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Java Forum / General / May 2007Running an Executable Before Executable JAR
Is it possible to run an executable prior to the execution of a JAR file? Currently, I am doing this via a batch file, but, my customer only wants to click on the JAR file and have everything run (additional external executable first, then JAR). I haven't found anything online, although I'm not sure I'm searching for the correct terminology. Thanks for any help. > Is it possible to run an executable prior to the execution of a JAR > file? Currently, I am doing this via a batch file, but, my customer [quoted text clipped - 3 lines] > I haven't found anything online, although I'm not sure I'm searching > for the correct terminology. How about having the batch file end with java -jar ... ... and telling the customer to launch the batch file (only) instead of the JAR?  SignatureEric Sosman esosman@acm-dot-org.invalid > > Is it possible to run an executable prior to the execution of a JAR > > file? Currently, I am doing this via a batch file, but, my customer [quoted text clipped - 14 lines] > Eric Sosman > esos...@acm-dot-org.invalid This is the way it was originally done. However, the customer doesn't like the batch file window staying open in the background. Haha, small problem I know, but it kind of made me curious if it could even be done. Jason Cavett schrieb: > Is it possible to run an executable prior to the execution of a JAR > file? Currently, I am doing this via a batch file, but, my customer [quoted text clipped - 5 lines] > > Thanks for any help. Hi Jason What about telling the OS (eg. windows / linux / macOS) that JAR-files should be executable (using java -jar or javaw) by clicking on them. On Windows this is the standard, when you install a new JRE. Then simply make your manifest pointing to your main class (MANIFEST.MF = main-class: MyMain) and calling the external executable from within the java-main()-method [using the java.lang.Runtime.exec()-method]? So actually your JVM is loaded first, starting your main(), then your exe is executed and then the rest of your bytecode will be executed. But probably I have not understood the "everything" correctly. Actually, the way it is stated in your question, I think its logically impossible: - "the custommer only wants to click on the JAR file ... This will make the jar run first! Except you have a link on your desktop which is called XYZ.jar and actually points to a batch or exe-file ;-) - ... and have everyting (whatever this is but including the JAR) run" This will run your exe and (", then JAR"), which will call itself recursively? Does your customer realy mean, that the jar (which he clicked at the beginning) has to be executed again? Greets phi > What about telling the OS (eg. windows / linux / macOS) that JAR-files > should be executable (using java -jar or javaw) by clicking on them. > On Windows this is the standard, when you install a new JRE. That's standard on Mac OS X too, although most folks take the extra step of bundling the .jar into a .app bundle if they have a lot of Mac users. That way they can specify the icon, associate document extensions, etc. that you don't get with a generic .jar. sherm-- SignatureWeb Hosting by West Virginians, for West Virginians: http://wv-www.net Cocoa programming in Perl: http://camelbones.sourceforge.net Sherm Pendley schrieb: >> What about telling the OS (eg. windows / linux / macOS) that JAR-files >> should be executable (using java -jar or javaw) by clicking on them. [quoted text clipped - 6 lines] > > sherm-- Hi Sherm Thanks for competion, when I was a mac user years ago, there was no Java around (1985)... The issue of bundling a jar into an application seams to be different on every platform. I don't think that it is pure a Java issue, but an OS issue as well. Probably we should know, on which OS our friend Jason wants to execute his application. If it's on Gnome (linux), I have some knowledge on making "application starters"... phi > Jason Cavett schrieb: > [quoted text clipped - 35 lines] > > Greets phi I'm on a Windows system. And, yeah, they basically don't want to see the batch file window (see post above). I *could* do the Runtime.exec (or Process), but the location of the executable file is not static, so then I'd have to set it up as a config. Either way, I also agree that this may not be possible. That's why I wanted to ask the brains here and see if anybody knew of any way to accomplish the task. >> Jason Cavett schrieb: >> [quoted text clipped - 46 lines] > wanted to ask the brains here and see if anybody knew of any way to > accomplish the task. would the windows "start" command do your job? I vaguely remember using it, think it starts a process for you and disconnects it from the cmd window letting it close so maybe you could use it at the end of your batch file to start up the jvm using javaw? > I'm on a Windows system. > [quoted text clipped - 6 lines] > wanted to ask the brains here and see if anybody knew of any way to > accomplish the task. I haven't done it, so I am not sure it will work. Can you create a small VB or C# program that runs your jar and then compile it as executable? Thais way even if you have to open a command prompt you can hide it. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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