Command line options in Jar files?

Can I set a command line option in the manifest of my jar file so that when it is double clicked it will invoke the JVM with my command line option??

Trying to pass to the JVM, not my code.I see.
Actually I wish sun would just fix the dang option towork
as it should and not need to be on the commandline...
And that won't happen.
Your presumption is that the manifest could somehow do
the command line options. But by the time the
manifest and jar file is read, the JVM is already
running and fully functional. Most of the
functionality that you see in the jvm is actually
implemented by other java classes. So the JVM has to
be running before it can do anything.
With sun jdk 1.3 a hello world program loads 180+
classes. This is not pre-loading but rather load on
demand, it needs all of those classes to load, resolve
and run the hello world program.
Actually I am aware of the classes which implement this functionality. It would be VERY easy for sun to empty the connection cache, they just choose to not let us do it for whatever bonehead reason. ANYONE who uses an internet inabled java application/applet will have this issue. Is java supposedly internet friendly?
Just try it. unplug your internet, use a java application to try and connect to some URL (telnet, ftp, whatever). Plugin your internet connection and see that you will not be able to connect untill you restart your app.
Crazy. This should be implemented. Its got 2 be a bug. they dont even tell you its command line only...

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Include command line args in jar file

If I make and executable jar file, how can I make it so that when it runs certain comman line arguments are included

If by "executable jar" you mean that you want to click the jar and run the program (and are using Windows), then you would have to alter the Windows file association for jar files that Java created, adding those options to the javaw command. Note that that would affect all jars that are run this was.
If you're willing to use the "javaw -jar" command, then just add the options to the javaw command.

JAVA command line options -cp and -jar don't work together?

Running JSDK 1.4.2 under Windows. I have a Java application that tries to dynamically load a class name that the user enters as follows:
try {
classResult = java.lang.Class.forName(strFilterName);
catch (ExceptionInInitializerError e) {
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catch (LinkageError e) {
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This works fine if the classes that make up my application are left as class files in the classpath, but fails to work if they have been collected and run from a JAR file. Note: I can even dynamically load the class when running from the JAR file, if the class I'm trying to load is within that JAR file too. The problem really occurrs when the dynamically loaded class is located someplace else in my classpath. I've tried using various combinations of the "-cp" and "-jar" Java command line options - but when loading and running from a JAR file - the "-cp" parameters seem to be ignored. Is this a bug? Has anyone ever seen this before?
I run my program from the JAR file using this command:
java -cp .;e:\entmgr\filters -jar EntMgr.jar
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I have tried forcing the "java.lang.Class.forName(strFilterName);" call to use the system class loader, the parent of the system class loaded, and even the null bootstrap class loader - all with no success.
I am suspecting that the class loader that is loading and running my main program from the JAR file, is just not paying any attention to the "-cp" parameter when the "-jar" parameter is present. Indeed, I have never seen any change in the failure, no matter what I put in the "-cp" parameter when using the JAR file.
When I run this without using the JAR file, here is the command I execute:
java -cp .;davidp\snmp;filters davidp.snmp.EntMgr
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So, is there some bug that precludes the "-cp" parameter from working correctly when the "-jar" parameter is used? Is there some other way to initialize or set up the classloader I'm using, so it can find things outside of the JAR file I'm running from? I would hope that it is possible to get the same behavior from my program, no matter if it is run from a JAR file or not.
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These posts are pretty old, but this page came up in a google search while I was having the same problem, so I thought I would throw my own (Later found) solution in.
The -cp and -jar options did not work together for me, but I later learned that they didn't really have to (and you don't have to mess with jar manifest files).
While on the command line, if you want to set a specific class path and also run a jar, all you need to do is add the jar to whatever extra class path you need to use in the -cp <arg>, and then specify which class you want run from inside the jar.
IE:
java -cp <YourSpecialClasspath>: <PathToJar> <ClassToRunInsideOfJar>
in my case it was like:
java -cp /home/user/WebRCP.jar:./StandaloneInstaller.jar InstallLoader
Remember to put a ":" in between the two arguments for the class path (-cp).
Hope this helps someone in the future,
-Josh

Command line options in executable jar

Hello,
On a win32 system I have an executable jar that the user dbl clicks to run.
What I would like to do is maintain this simple dbl click to run but have command line options passed to the vm. ie I would like the dbl click to invoke
javaw -Xms60m -Xmx120m -jar myjarfile.jar
rather than just
javaw -jar myjarfile.jar
Can these options be placed in the jar files manifest? If so how? (I can't see how to do it)
Many thanks
Mike

why not use special .jar tool to help you to save much
of your time?
Thanks for the idea but it really doesn't answer my question.
Mike
[Edited by: jdcforumadmin1 on Jun 24, 2002 1:39 PM]

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Hi All
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i.e. before I Jar'd my program, I would do the following
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arg1
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QwA6AFwARABvAGMAdQBtAGUAbgB0AHMAIABhAG4AZAAgAFMAZQB0AHQAaQBu
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cwBcAE0AeQAgAE0AdQBzAGkAYwBcAHQAZQBzAHQAbABpAGIAcgBhAHIAeQA=
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How to pass command line options?

I know that command line options contrary to command line data arguments start with a prefix that uniquely identifies them.
I write an application that will copy files from one folder to another. It should be launched with the syntax as follows:
c:>java my.app.DirectoryScannerConsole
c:>scan ?input ?C:/test/in? ?output ?C:/test/out? ?mask ?*test*.xml? ?waitInterval 60000 ? includeSubfolders false ?autoDelete true
c:>exitSo after launching we have two commands: 'scan' and 'exit'. What should I make in my program to be able to invoke these commands in such a manner?
Edited by: Exaserge on Nov 8, 2008 10:38 AM
Edited by: Exaserge on Nov 8, 2008 10:40 AM

Maybe try using Scanner to read in the line of input, then break the line into an String array, then comparing the Strings in the array.
Something like...
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}I haven't tried to compile it or anything, so it may not be syntactically correct, but you should get the idea.
Edited by: chickenmeister on Nov 8, 2008 1:02 AM

Command line options in Jar files?

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