Run a jar-File and modify a file within this jar-File
I am running the jar-File, which contains my compiled java files etc.
The program has a config part, which is saved in xml file.
This xml file is in the same directory like the class files.
All theses files are zipped as jar-File.
Well, I am running the jar file.
- But how do I open and save the xml file ?
- Is that possible ?
- How difficult ist that ?
I tried to do this some time ago and found out the hard way that you can't, just as DrClap just told you. I would have taken his work for it anyway, but for what it's worth, I thought I'd mention that you're not alone. In my case I wanted to be cute and keep my properties all together within the .jar; thought it'd be cleaner that way. Ended up just creating the more typical class_name-props file in my home directory. Is this what you had in mind?
~Bill
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Barcode shows a bunch of squares when barcode is made on AI CS11. Does anyone know a fix for this? We have CS2 running on another PC and we don't get this problem.
Background:
Using FrameMaker 7.1 to create a PDF file where a CS11 barcode file is embedded. PDF generates fine but we get a bunch of squares when we copy and paste the barcode data into Notepad.
We have CS 2 running on another PC and we don't get this problem. Do I need to install a plugin (if any) for CS11 to get this to work?
Thanks!Thanks for your feedback. I was not able to mention earlier that in my line of work, we use Notepad to check if the barcode text is written correctly or if the corresponding text can be found if searched in the PDF... We use FREE3OF9.TTF font when entering text values for the barcode (usually in document/part number format exclusive for our company's use) in AI CS11. After saving the AI file, we attach it in a document using FrameMaker 7.1, then a PDF file is created. The output PDF will be a certification sheet for our products. They (our clients) should be able to scan the document/part number out of the barcode. I'm sorry, I could not divulge any other information so I am not sure if this clears out the issue. It used to work before but I had to get my PC formatted and since then I have been encountering this problem. I am trying to figure out if we missed to install a component or something got messed up after re-installing Adobe Illustrator CS11.
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I tried exiting Firefox using the File|exit menu item or just killing the window and (of course) re-booting the computer to see if that fixes the problem. Is this perhaps an incompatibility between the latest version of Firefox and Windows XP? (I do not have a problem like this on my Win 7 Professional (SP1) machine.)
take a look:
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i dont know what to do. please help!
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How to make jar files run using java.exe and not javaw.exe
Hi ,
I am developing a project in which there is an GUI which inturn will call a console . I have made it into an jar file now.
Here comes the problem. When i run the jar files , i don't get a console. While going through this forum, i came to know that jar runs using javaw.exe and this stops it from bring the console up.
Please suggest me a way of running the jar file through java.exe or any other method by which i can get an new console poping up.
PS : i cannot start the application itself in a system console , because the Console mode is an added feature and it is not to be displayed every time but only when the user intends to.Thanks for the reply pbrockway2. But i think, i was not able to convey my problem properly.
I am supposed to start my application in a GUI mode ( No console are should be present at this point of time). Within the GUI , i have a option for working in the console ( i.e if console is choosen, then i start giving my output and take inputs from the console. I am trying to do this by just calling the "System.out "and "System.in" methods. )
Here is the problem. As i have started it through " jar " it would not have a associated console with it.
PS: i cannot have launching .bat file because that would result in my application having a console displayed at the very start of the application. I want the console to be displayed only when the user wants to start in console mode.
Please suggest me some ways of doing this. Can i create a console from my java program and then exit it. -
Running a jar file from java code
Hi!
Im trying to run a jar file from my code.
I've tried Classloader, but that doesnt work because it doesnt find the images (also embedded in the 2nd jar file).
WHat I would like to do is actually RUN the 2nd jar file from the first jar file. There must be a way to do this right?
any ideas?ok, I found some wonderful code (see below) that will try to start the jar. But it doesn't. What it does is produce the following error when my application runs...
So it's not finding the images in the jar file that I am trying to run? Strange. I checked the URL that sending, but it seems ok....
I think I will check the url again to make sure......
any ideas?
Uncaught error fetching image:
java.lang.NullPointerException
at sun.awt.image.URLImageSource.getConnection(Unknown Source)
at sun.awt.image.URLImageSource.getDecoder(Unknown Source)
at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
at sun.awt.image.ImageFetcher.run(Unknown Source)
the code....
/* From http://java.sun.com/docs/books/tutorial/index.html */
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.Attributes;
* Runs a jar application from any url. Usage is 'java JarRunner url [args..]'
* where url is the url of the jar file and args is optional arguments to be
* passed to the application's main method.
public class JarRunner {
public static void main(String[] args) {
URL url = null;
try {
url = new URL(args[0]);//"VideoTagger.jar");
} catch (MalformedURLException e) {
System.out.println("Invalid URL: ");
// Create the class loader for the application jar file
JarClassLoader cl = new JarClassLoader(url);
// Get the application's main class name
String name = null;
try {
name = cl.getMainClassName();
} catch (IOException e) {
System.err.println("I/O error while loading JAR file:");
e.printStackTrace();
System.exit(1);
if (name == null) {
fatal("Specified jar file does not contain a 'Main-Class'"
+ " manifest attribute");
// Get arguments for the application
String[] newArgs = new String[args.length - 1];
System.arraycopy(args, 1, newArgs, 0, newArgs.length);
// Invoke application's main class
try {
cl.invokeClass(name, newArgs);
} catch (ClassNotFoundException e) {
fatal("Class not found: " + name);
} catch (NoSuchMethodException e) {
fatal("Class does not define a 'main' method: " + name);
} catch (InvocationTargetException e) {
e.getTargetException().printStackTrace();
System.exit(1);
private static void fatal(String s) {
System.err.println(s);
System.exit(1);
* A class loader for loading jar files, both local and remote.
class JarClassLoader extends URLClassLoader {
private URL url;
* Creates a new JarClassLoader for the specified url.
* @param url
* the url of the jar file
public JarClassLoader(URL url) {
super(new URL[] { url });
this.url = url;
* Returns the name of the jar file main class, or null if no "Main-Class"
* manifest attributes was defined.
public String getMainClassName() throws IOException {
URL u = new URL("jar", "", url + "!/");
JarURLConnection uc = (JarURLConnection) u.openConnection();
Attributes attr = uc.getMainAttributes();
return attr != null ? attr.getValue(Attributes.Name.MAIN_CLASS) : null;
* Invokes the application in this jar file given the name of the main class
* and an array of arguments. The class must define a static method "main"
* which takes an array of String arguemtns and is of return type "void".
* @param name
* the name of the main class
* @param args
* the arguments for the application
* @exception ClassNotFoundException
* if the specified class could not be found
* @exception NoSuchMethodException
* if the specified class does not contain a "main" method
* @exception InvocationTargetException
* if the application raised an exception
public void invokeClass(String name, String[] args)
throws ClassNotFoundException, NoSuchMethodException,
InvocationTargetException {
Class c = loadClass(name);
Method m = c.getMethod("main", new Class[] { args.getClass() });
m.setAccessible(true);
int mods = m.getModifiers();
if (m.getReturnType() != void.class || !Modifier.isStatic(mods)
|| !Modifier.isPublic(mods)) {
throw new NoSuchMethodException("main");
try {
m.invoke(null, new Object[] { args });
} catch (IllegalAccessException e) {
// This should not happen, as we have disabled access checks
} -
Run applications ( .jar files) by bash on linux
On linux:
I have a swing application and its jar file. I created an executable file using bash script to run the jar file
#!/bin/bash
java -jar myapp.jar
this runs in console normally but when i clicked the executable file, the application runs too but immediately closes. I think the problem is that this can't recognize the swing-layout.jar (swing library) so that the swing components (JFrame,Jbutton) cannot be showed!
There must be a way for the executable file to recognize the libraries (swing, layouts) for the application by using bash script ?There can be number of reasons for that. I suggest you following way:
1. Modify your script in following way:
#!/bin/bash
java -jar myapp.jar 2>/tmp/log.err 1>/tmp/log.out
After unsuccesful execution check content of /tmp/log.* files and see details of the error.
Often such errors are caused by environment. May be you just don have java in your PATH .. May
be DISPLAY is not set .. I don't know.
To workaround env issue you need to dump environmentin from console:
declare -x >env.sh
After that include update your .sh script in following way and see the difference:
#!/bin/bash
. env.sh
java -jar myapp.jar 2>/tmp/log.err 1>/tmp/log.out -
Images are not comming out when application is running through jar file.
I have written an application program using j2sdk1.4.1 that needs your help.
My application folder's contents.....................................................................................
C:\Examination\Examination.class <-----This is the main class and application's entry point.
C:\Examination\ExamBox.class
C:\Examination\PaperSetterBox.class
C:\Examination\pspBox.class
C:\Examination\epBox.class
C:\Examination\TimerBox.class
C:\Examination\ReportCardBox.class
C:\Examination\HelpBox.class
C:\Examination\AboutBox.class
C:\Examination\Images\(some jpg & gif files)
C:\Examination\Sounds\(some au files)
Compilation Report: There was no error.
Execution Report : Was working properly using the command:- java Examination
Now, I created a jar file for my application in the following steps.................................
STEP-1: Firstly, I created a text file(mainclassInfo.txt) that contains
the line:-- Main-Class: Examination
This line would be automatically added to the default manifest file when I would include the name of that text file with the command to create the jar file.
Location of the text file I created: C:\mainClassInfo.txt
STEP-2: Then I went to C:\Examination and executed the following command(by using 'Command prompt'):--------------------------------------------------------------------
jar cmf C:\mainClassInfo.txt Examination.jar Examination.class ExamBox.class PaperSetterBox.class pspBox.class epBox.class TimerBox.class ReportCardBox.class HelpBox.class AboutBox.class Images Sounds
Finally, I got the jar file:- Examination.jar
Double clicking on it application ran as it was expected.
Then, I thought, that as all the files & folders the application needed to run properly were packaged in the jar file; I should delete all the contents of the folder 'Examination', so that no one could see or use anything of the resources easily. I did that.
So, then it became only:-- C:\Examination\Examination.jar
Thereafter, I tried to run the application again and there a problem occurred! The application was running, but the images, those were to be used and shown by the application were missing somehow!!
Moreover, when I kept a copy of those 2 folders('Images' and 'Sounds') into the C:\Examination and ran the application again all the images came out normally!
I just can't understand why it's happening so mysterious?
I don't want to leave anything of the resources in an open place; I mean, outside of the jar file. The images should be used and shown by the application.
Help me please!The Image class itself does not have any methods for loading images from files so you must be using something more. Most methods for loading images from files have an overload that lets you use a URL, so you just need to use that method with a call to getResource like in the other thread. If you can't think of anything else, you can use ImageIcon to load an Image (the Image is returned by a call to ImageIcon.getImage). See also "how to use icons" from the swing tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/misc/icon.html -
Images are not coming out when application running through jar file.
I have written an application program using j2sdk1.4.1 that needs your help.
My application folder's contents.....................
C:\Examination\Examination.class <-----This is the main class and application's entry point.
C:\Examination\ExamBox.class
C:\Examination\PaperSetterBox.class
C:\Examination\pspBox.class
C:\Examination\epBox.class
C:\Examination\TimerBox.class
C:\Examination\ReportCardBox.class
C:\Examination\HelpBox.class
C:\Examination\AboutBox.class
C:\Examination\Images\(some jpg & gif files)
C:\Examination\Sounds\(some au files)
Compilation Report: There was no error.
Execution Report : Was working properly using the command:- java Examination
Now, I created a jar file for my application in the following steps.................................
STEP-1: Firstly, I created a text file(mainclassInfo.txt) that contains
the line:-- Main-Class: Examination
This line would be automatically added to the default manifest file when I would include the name of that text file with the command to create the jar file.
Location of the text file I created: C:\mainClassInfo.txt
STEP-2: Then I went to C:\Examination and executed the following command(by using 'Command prompt'):--------------------------------------------------------------------
jar cmf C:\mainClassInfo.txt Examination.jar Examination.class ExamBox.class PaperSetterBox.class pspBox.class epBox.class TimerBox.class ReportCardBox.class HelpBox.class AboutBox.class Images Sounds
Finally, I got the jar file:- Examination.jar
Double clicking on it application ran as it was expected.
Then, I thought, that as all the files & folders the application needed to run properly were packaged in the jar file; I should delete all the contents of the folder 'Examination', so that no one could see or use anything of the resources easily. I did that.
So, then it became only:-- C:\Examination\Examination.jar
Thereafter, I tried to run the application again and there a problem occurred! The application was running, but the images, those were to be used and shown by the application were missing somehow!!
Moreover, when I kept a copy of those 2 folders('Images' and 'Sounds') into the C:\Examination and ran the application again all the images came out normally!
I just can't understand why it's happening so mysterious?
I don't want to leave anything of the resources in an open place; I mean, outside of the jar file. The images should be used and shown by the application.
Help me please!double post http://forum.java.sun.com/thread.jspa?threadID=582311
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[SOLVED]Java error running a .jar file
Hi. I'm running Arch 64 and I keep getting this error when trying to run
java -jar TwinkEdit-0.6.9.jar (from twinkle.sourceforge.net -- a flashcard program for palm. This .jar is the desktop editor for the flashcards. It's worked before on Linux ... but that was almost 2 years ago.)
Exception in thread "AWT-EventQueue-0" java.util.NoSuchElementException
at java.util.Vector.firstElement(Vector.java:442)
at org.ekimd.twinkedit.TwinkUI.getJapFont(TwinkUI.java:979)
at org.ekimd.twinkedit.TwinkUI$DynamicView.<init>(TwinkUI.java:589)
at org.ekimd.twinkedit.TwinkUI.getDynamicView(TwinkUI.java:815)
at org.ekimd.twinkedit.TwinkUI.access$1300(TwinkUI.java:88)
at org.ekimd.twinkedit.TwinkUI$NewAction.actionPerformed(TwinkUI.java:1101)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6041)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5806)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4413)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4243)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2440)
at java.awt.Component.dispatchEvent(Component.java:4243)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
It happens in both 32 bit (arch32 chroot) and 64 bit jre's exactly the same.
java -version gives:
java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) 64-Bit Server VM (build 10.0-b23, mixed mode)
(It also doesn't work on Windows, either .... I think it must be a Java version compatibility problem ??)
Any ideas?
Thanks,
Scott
Last edited by firecat53 (2008-09-27 14:07:04)I gave it a try and got the same error. Then I started looking at the code:
When you create a new file, the program starts looking for a font which supports japanes (don't ask me why). If it doesn't find any it throws the error you posted above. I was able to create a new file after I installed ttf-bitstream-cyberbit from AUR (first font supporting japanese I could find).
You should contact the author and submit a bug report. Even if the program really needs japanese fonts, which I doubt, failing like this is just bad.
Last edited by Garns (2008-09-27 13:26:05) -
How can i run a jar file as EXE on mouse click..
*{color:#0000ff}how can i run a jar file as EXE on mouse click..is it possible in any way?????????{color}*
amrit_j2ee wrote:
*{color:#0000ff}how can i run a jar file as EXE on mouse click..is it possible in any way?????????{color}*Do you mean converting it from a jar file to an EXE file or do you mean that you would like to run the application by just double clicking it?
If it's the latter then you need to make the jar file including a manifest.
The manifest can be just a txt file with its content to be something like this:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: Somebody
Main-Class: NameOfTheMainClass
Class-Path:
X-COMMENT: Main-Class will be added automatically by buildTo make the jar file including the manifest, use something like this in your command prompt (of course you must have compiled your java file(s) first):
jar cfm test.jar MANIFEST.txt NameOfTheMainClass.classAfter that you'd be able to run your application just by double clicking it.
If you're a NetBeans user, you can build your standalone application by right-clicking your project and then going to properties => run => and choosing a Main class. After that right click on that project and "Clean and Build", locate the jar file in the "dist" folder and double click it =]
Hope it helps,
LD -
How to run a jar file in a browswer?
Hi, everyone:
I got a problem here. I would like to run my jar file in a html-based brower, should I write another applet for my jar file? How can I do that? (I don't have applet in my jar file, but only JFrame) Is there any way I can put a runnable jar file into an applet and show on the brower? Could anyone show me how to write this code? Thank you very much!!
-jxchouAt first you need a java plug-in for your browser.
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The tag in your html-document should look like:
<applet code="Sample.class" archive="sample.jar" width="400" height="400"></applet> -
How to run a jar file in JBuilder
Hi there
I need to know how to run a jar file using JBuilder. Thanks :)
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experten Archiv-builder
look at something that has a similar name -
How to run a JAR file in Unix system?
hi there
ca anyone tell me how to run a JAR file in unix system or X window, thank youYou want to create an executable JAR file? You do it in the following way.
Create a manifest file such as manif.txt and the contents should contain
Main-Class: foo
assuming foo is the name of your main class. Then create the jar as follows
jar cvfm foo.jar manif.txt foo.class
I hope that helps you!
you can find more info here http://java.sun.com/docs/books/tutorial/jar/ -
OutOfMemory Exception while running a JAR file
Hi,
I am working with Java 1.5 and using Eclipse to build a GUI. My application has intensive image loading involved so I set -Xmx inside Eclipse when running the application in debug mode.
However, once a JAR file is exported, I do not know how to specify the heap size required to run the program. Is there a way to ...
1. embed the heap size info inside the JAR file?
2. specify a heap size when running the JAR file?
Thanks in advance.Heap size is specified by the -Xmx option on the java command. See the java command documentation.
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