Jar file helper application

I have a file extension (.hgf) that I would like to associate with with a Java jar file. I'm running Ubuntu 11.11 and in Dolphin (the file manager GUI) I use "java -jar ~/Havannah/HGui/HGui.jar" as my 'open with' and clicking on hgf files in Dolphin will automatically run my HGui.jar program with the clicked file as input.
When I try to do the same thing in Friefox with 'open with' I cannot get it to work. The file gets saved in /tmp but HGui never seems to run on it. I've tried various combinations of quotes, putting the command into a shell script, etc., but cannot seem to get the click and open behavior I would love to see.
Thanks in advance for any suggestions you might have!

Simply putting the path to the jar file (making no mention of Java) and making the jar file executable was enough to make it work. This did not work in Dolphin so I did not even try it in Firefox -- until I got desperate.

Similar Messages

How do I prevent Spotlight from categorizing 'JAR' files as 'Application'

I'm a java developer and consequently I have a lot of JAR files on the filesystem. The JAR file format is a standard archive format for java, and is used mostly to package library code - the java equivalent of a DLL. They can also be created as 'executable JAR's, but this is (very) infrequent compared to the library usage.
Spotlight seems to think every JAR file is an application, and because I have a lot of java applications and development stuff installed, I can no longer reliably use Spotlight to find actual applications because the search results are overflowing with useless JAR file entries.
Is there any way to configure spotlight to not classify JARS as applications? Or, alternately, can I make Spotlight ignore JARs completely? Either would save me a lot of time..
/Bill

There are several things in the current version of Spotlight that are either broken or just plain wrong. It looks like you have found another. When I look at the metadata for a jar file I see that its type is, well, a java jar file, and its content tree declares it to be a com.sun.java-archive. Finder gets this right: if you do GetInfo on such a jar file its kind is shown as "Java JAR file"--as it should be.
When I made a saved search, using the Kind drop-down menu to get the pre-defined Application, and then looked to see what criteria Spotlight was using to define "application" (and yes, the search included jar files in its results), I discovered Spotlight was NOT using the simple, straightforward "kMDItemKind=Application" as one would expect. Instead it is using something I had never heard of to define an Application, to wit "_kMDItemGroupId = 8"--furthermore, I believe characterizing applications that way has been deprecated. Be that as it may, it doesn't work to find the things you want, and exclude the things you don't.
There is no way for a user to fix this. The only thing you can do is not let Spotlight define the kind. Thus, if you bring up a search window do not use the Kind drop-down menu to select Application. Instead select Other from the menu and then type Application. You then get only things whose type declaration is Application, and you don't get jar files or widgets.
The other option is to exclude jar files by typing
NOT jar
in the search for box (you'll still get widgets though). You can also add that boolean restriction if you are using the menu bar Spotlight search.
Francine
Francine
Schwieder

Beginner: Can't convert a hello.class file into a jar file: HELP PLEASE!!!

Hi, I created a hello.java file, converted into a hello.class file by using the java 2SDk compiler. The problem is that the hello.class file is in a directory I created: C:\JavaBuilder\hello.class
I have a problem converting the hello class file into a jar file. I don't know which approach to take. I've looked at tutorials...but I keep getting more confused each time I view the tutorials on creating jar files. Please can someone help..by taking me through a step by step process. Please be explicit and do not leave or assume that I know any details because I'm a new born beginner. Thank you very much, I seriously appreciate it.

Hi i did as you suggested, only with these exceptions:
jar -cvf hello.jar C:\JavaBuilder\hello.class
I did this and got the message: "adding : C:\JavaBuilder\hello.class (in=1150) (out=708) (deflated=38%)"
The problem is that when I tried to execute the jar file...by typing: " java -jar hello.jar" I received the error message: "Failed to load Main-Class Manifest attribute from hello.jar" Is there any way to correct this problem? please help, thank you.

How can I make .jar files for applications?

My jar program creates jar files but won't open the program when I double click them. I use the command:
jar cvf *.jar filenames
The jar file is created but won't execute. Can anyone tell me what i am doing wrong?
Thanks
Jiby

Hello !
Well, I had the same problem a week or two ago !
First, in your *.java, don't use any package...I mean, don't do a package of your program (I guess there is a way to make it work with, but it would need a little bit more work...).
Then, with the jar tools, use the command
-jar cf jar_that_you_want_to_create.jar class-that_you_include_in_your_jar.class
With that, a jar will be created, and when you will try to "run" it, it will say that it can not find the main class...
You need a Manifest !
Create a text file MyManifest.text, and write that in your text file :
Main-Class: classname
follow the same as i wrote above. leave a blank after colon and a blank line after the first line like above.
then, well, use tha jar tool again:
-jar umf MyManifest.txt jar-file-you-created.jar
To "run" it, double click on it, or use the java tool:
java -jar jar_you_created.jar
Thanks to Phani, who helped me with that !!
Splitsch

How to make jar file of application using JMF

Hi
i developed an application which uses JMF it works well during compilation and displays audio and video too.
but after builting jar file it doesn't works.
abdul

Well you've found the root of your problem. It's not necessary the JMF. It's when you make a jar file, you need to include the dependencies. I don't think it' legal to include the JMF in a program you sell or distribute, so be careful there.
However, to include dependencies in jar files is not a hard task. The simplest method is to unjar the dependency and place it at the top or your classpath; then make a jar that includes both your program, and the dependency.
A more long term solution is to use a build system such as ant or maven to create the package using available scripts or plugins. The "Uberjar" plugin for maven comes to mind.
-vito

Jar files as application Error under linux

I created a jar file with the following jar command
jar cmf mainclass Asdi2GuiJar.jar *.class
Main-Class: ASDIGUI
It did work without any problem : java -jar Asdi2GuiJar.jar
when I added to the CLASSPATH under linux "Redhat 7.2" C-shell, it give me an error:
Exception in the thread main java.util.zip.ZipException: No Such file or directory
even im not using any zip file class in my java application. Any idea why im getting such an error even before addding the jar file to the CLASSPATH it did work without any problem?

ah young grasshopper you are using zip files :) rename your .jar file a .zip and use unzip on it :)
and that error means that the jvm's classloader couldn't load it's zip component so it's likely that your jvm can't find it's standard lib's
make sure your class path points to the /lib directory of your java install..... which version of the jdk are you using?
are you setting the classpath globally? since the way you said CLASSPATH I guess you are... ....are you keeping the old classpath when you set it? like CLASSPATH=$CLASSPATH:/myNewSource
or something like that...
maybe something in that will help

Error not alloving sign my jar file - help needed

hi guys i am getting the following error while trying to sign the jar file.
unable to sign the jar ; jar.util.zip.zip exception: invalid entry compressed size .
i got this while signing the msbase and msutil of MS jdbc jar files.
what am i suppose to do.
I am unable to understand one more thing. Do i need to have both jdbcodbc.dll library and msbase,msutil, mssqlserver jar files to connect using jdbc or its ok if i only have the jar files. I would appreciate if somebody can help me in this regard.
thanks,
ravi.

hi guys i got the problem solved i unzipped the files and zipped them agian. Its working well .
thanks,
ravi.

Application working under NetBeans but not as a *.jar file

Hello,
recently I found a little problem. I wrote application that shows all available ports in my computer. When I am running this applications under NetBeans it works with no problem - finds all available ports. Then I am building it to the *.jar file. Application is working with no problem but command:
Enumeration PortIds = CommPortIdentifier.getPortIdentifiers();
is not returning any identifiers - PortIds is empty.
Anyone knows a solution for this type of problems? Thanks

Hi Venkatesh,
Few questions.
1. What is your JDeveloper version? (Always better to post your JDev version along with the question, which would help us to help you better).
2. Did you try adding webserviceclient.jar to the classpath? (Search in your JDev installation directory for the location of this jar file).
-Arun

Help To Create a Jar File

hi there
i wanna create a exe file so i am trying to use jar file.
I am new at creating jar files, my application has a main file and other java files, i am using other java files in my main file my concern is can i create a jar file including all the files and when i run jar file i want to complie java files, i really appreciate if anyone can help me out creating a jar file to compile and execute java files

http://java.sun.com/j2se/1.4.2/docs/guide/jar/index.html

Gif file not found in JAR from Java Application

Hello Forumers,
Could some one please explain how to create a JAR file from where I can get a GIF file. I have tried a number of different ways but it allways fails. (I have tried to add the GIF files using the jar command and I have tried to add it using WinZip after the jar is created).
To isolate the problem I created this very simple program, the program works very well when the gif file resides on the directory from where I run the Application, but when I remove it from the directory it fails. I have tried to put the GIF file in the JAR in a number of different ways but it allways fails. (I have also tried with and without slash before the name of the GIF). I guess the problem is the way I create the JAR file
import java.io.*;
public class GifTest
{ public static void main(String args[])
{ InputStream in = GifTest.class.getResourceAsStream("/open.gif");
if (in==null)
System.out.println("Null returned");
else
System.out.println("OK");
Any Hints appreciated
/Kjell

Hi,
here is a small application using my own class GetImageIcon.
Normally I have this "help-class" in a utility-package to use it from all my projects without copying. For this example I copied the code in the test application. Feel free to use the code of the class like you want. For me it works fine.
Do the following:
1. Create a folder called /meta-inf under the folder where the class-files are. Use a text-editor and create a file saved as "manifest.mf".
manifest.mf tells the jar-file which is the main-class from where the application will start when double-clicked.
It only has to contain one line:
Main-Class: GifTest
2. Compile and create the jar file. I made a bat-file containing:
javac -verbose GifTest.java
%pause
REM Create Jar-File
jar cmf meta-inf/manifest.mf GifTest.jar *.class *.gif
REM Show Table of Content of the Jar-File
jar tf GifTest.jar
%pause
So you can see what's in the jar-file.
3. When you double-click on the jar-file the application is executed. So it is easier to use for the users. They don't have to type in anything on the command-line. You can deploy this jar-file to any client and run it. The only thing you have to do, is to install the JRE on the clients.
I develop with JDK 1.3.1 and JRE 1.3.1 is installed on the clients of the company I work for.
//Begin of the code
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.util.jar.*;
public class GifTest extends JFrame
        protected JLabel m_title;
        protected ImageIcon m_image;
        static File file;
        //You have to define the name of the jar-file
        static String jarFile = "GifTest.jar";
        //Instance of the class GetImageIcon
        protected GetImageIcon gii = new GetImageIcon();
        public GifTest()
                super("GifTest");
                setSize(400,200);
                //the name of the image and the name of the jar-file the image resides in
                m_image = gii.getImageIcon("orb.gif", "GifTest.jar");
                m_title = new JLabel(null, m_image, SwingConstants.CENTER);
                getContentPane().add(m_title, BorderLayout.NORTH);
        public static void main(String argv[]) {
                GifTest frame = new GifTest();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
public class GetImageIcon{
* @param fileName the full qualified name of the file
* from the root of your application. use a "/" before the
* fileName, eg. /images/warning.gif
    public ImageIcon getImageIcon(String fileName, String jarName) {
        int counter, c, i = 0;
        byte buffer[];
        JarFile jfile;
        JarEntry jentry;
        InputStream in;
        ImageIcon m_image;
        try{
                // Create Jar-File object from JarFile
                jfile = new JarFile(jarName);
        catch(Exception ex){
                System.out.println("JarFile-Problem " + "\n" + ex);
                return null;
        try{
                // create Jar-Entry object from File-Name in JarFile
                jentry = jfile.getJarEntry(fileName);
        catch(Exception ex){
                System.out.println("JarEntry-Problem " + "\n" + ex);
                return null;
        try{
                // create InputStream from JarEntry
                in = jfile.getInputStream(jentry);
        catch(Exception ex){
                System.out.println("JarEntry-Problem " + "\n" + ex);
                return null;
        try{
                //get uncompressed size of entry data in Jar-File and create byte-array with this size
                buffer = new byte[(int)jentry.getSize()];
                //write int-value 'c' (casted to byte) with read() and while-loop in byte-Array
                while((c = in.read()) != -1){
                        buffer[i] = (byte)c;
                        i++;
        catch(Exception ex){
                System.out.println("in.read()-Problem " + "\n" + ex);
                return null;
        try{
                //create ImageIcon with byte-Array 'buffer'
                m_image = new ImageIcon(buffer);
        catch(Exception ex){
                System.out.println("ImageIcon-Problem " + "\n" + ex);
                return null;
        // return the created ImageIcon
        return m_image;
}

To create a desktop shortcut icon for the application for a jar file

Hi
I have created a jar file for my application. when i double click this jar file, the application opens.
What i want is--
Instead of user clicking on the jar file, my application also has to create a desktop shortcut icon.
If the user clicks on the icon which is on the desktop the application should open.
Please suggest me.
Thanks in advance.

>
Please suggest me.>Launch the application using java webstart. A webstart launch offers things like a splash screen, automatic updates, and desktop integration in the form of desktop shortcuts and program menu items. If the launch file specifies icons, they are used for the shortcuts, otherwise a generic icon is used.
For a comparison between a sandboxed webstart launch and a plain app., try the [Text Width Checker|http://pscode.org/twc/].
While the TWC can run OK within the security sandbox, many applications need to be digitally signed and request extended permissions, to do what they need to do.
STBC is an all-permissions webstart launch.
Edit 1:
And for one that definitely suggests desktop shortcuts (I usually avoid them, in favor of a menu item only), try the sandboxed [demo of the PrintService|http://pscode.org/jws/api.html#prs], which prompts the user to choose.
Edited by: AndrewThompson64 on Sep 2, 2008 10:49 PM

Restart application or reload jar-file(class-files)

hi,
i write an update service for my application!everytime a update is available, the new jar-file(my application) will be downloaded and replace the old, running jar-file! now i want to restart my application to use not a mix of old and new class-files in the vm!
is there any possibility for restarting my java vm or is there another way to "refresh the class-files in the vm"?
thx mseele

Hi,
The easiest way is to terminate the jvm (using System.exit), and just have a loop in the script file that starts your application. In that way your application will be restarted when the jvm exits.
To write a classloader of your own is another, but a lot harder way.
/Kaj

In .jar file how can I call API's of other .Jar file

Hi all,
I have created a "MyApplication.jar" file that dose not need any other .jar file Like xercesImpl.jar thne it is working fine.
but If I make the .jar file of application that needs xercesImpl.jar API's
of this .jar file then how I can call that xercesImpl.jar in my Application.jar newly created.
please help me
Thanks in advance.

either add the other jar file to your classpath or do the following (taken from http://javaalmanac.com/egs/java.lang/LoadClass.html)
e68. Loading a Class That Is Not on the Classpath
A URLClassLoader can be used to load classes in any directory.
    // Create a File object on the root of the directory containing the class file
    File file = new File("c:\\myclasses\\");
    try {
        // Convert File to a URL
        URL url = file.toURL();          // file:/c:/myclasses/
        URL[] urls = new URL[]{url};
        // Create a new class loader with the directory
        ClassLoader cl = new URLClassLoader(urls);
        // Load in the class; MyClass.class should be located in
        // the directory file:/c:/myclasses/com/mycompany
        Class cls = cl.loadClass("com.mycompany.MyClass");
    } catch (MalformedURLException e) {
    } catch (ClassNotFoundException e) {
    }

How to use a packaged Jar File?

Greetings to everyone reading this post!
I have a query about a thing that seems to be basic but I don't know how to accomplish, here it goes:
I have packaged a Simple application into a Jar file. this application contains a package like this:
lib.demo, inside this package I have a Class named MyClass with some simple methods like this one:
public void sayHi(String name){
//implementation here
}Now, I would like to Know how to use the Method sayHI(String name) from an entirely different Project. I have successfully included the Jar File as a Library(in the new Project), but I have I no Clue on How to invoke a Class inside my Jar library, and more Importantly, a method.
Could anybody help me?

if the "project" (not a Java-related system, it's IDE-specific) already includes the JAR file in its classpath (library), then all you need is to import the package/class and invoke the method, as such:
// in your client code:
import lib.demo.*;         // or, import lib.demo.MyClass;
public class Test {
public void inAMethod() {
    MyClass myC = new MyClass();
    myC.sayHi("say hi");
}simple.

JAR files just won´t run, multiple systems, JRE & JDK installed.

Hi!
I´ve been looking on many different places for an answer for this issue:
I have to run different JAR files for applications, one is from Apache ActiveMQ, and the other is a hash calculating app. I´ve read on many topics that if you get error "Failed to load Main-Class" when running a JAR, the problem is how the JAR was packed (MANIFEST). Well, I find highly unlikely that two different JARs, from different sources, are wrongly packed. Also, I´ve installed JRE, JDK and even Java EE, on MS Server 2003 and on Windows 7 (on this last one only JRE), and no JAR runs. I´ve tried declaring PATH and JAVA_HOME environment variables... no use. Can anyone help me solve my problem?

Hi,
You might want to look in your control panel for 'Java' icon. It should give you an option to enable java plugin into your browser. Let me know if you still face the issue.
Thanks!

Jar file helper application

Similar Messages

Maybe you are looking for