How to read some files inside the jar

Hi,
I have an applet that runs with JWS. The user can input some information and then I need to show this information in a web page. As the application can be run offline, I cannnot use JSP�s to generate the web page. The information is saved in a xml file, so I use a xsl parser to generate the html code. The problem is that I have to include some javascript files (.js). I put these files inside the jar, but, how can I read these files, or how can I reference these files from inside the html page ?
Thanks !

You can use getClass().getResource(classpath)
to get a stream version of the data from your
jar file. If you need to put it in a file, you
can write that stream to a file in a temp directory.
classpath is the classpath of your js file

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Hi all,
I want to read the file inside the jar file, use following method:
File file = new File("filename");
It works if not in JAR file, but it doesn't work if it's in a JAR file.
I found someone had the same problem, but no reply.
http://forum.java.sun.com/thread.jsp?forum=22&thread=180618
Can you help me ? I have tried this for all night !
Thanks in advance
Leo

If you want to read a file from the JAR file that the
application is packaged in (rather than a separate
external JAR file) you do it like this ...
InputStream is =
ClassLoader.getSystemResourceAsStream("filename");Better to use
this.getClass().getClassLoader().getResourceAsStream();
From a class near to where the data is. This deals with multiple classloaders properly.

How to read a file inside the JAR file

Hi All,
I want to save some preferences in a file called "preferences". I kept the preferences file under my java package.
If i am running the code inside the NetBeans 6.9 IDE it's working file. But once i have created a JAR and try to run the application, it couldn't find the path.
Please help me that how to resolve this issue. I don't want to save this preferences file outside of my JAR (i.e) within my java package.
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package mypackage;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
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        try
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            PrintWriter writer = new PrintWriter(out);
            writer.println("Hello Java!");
            writer.close();
            out.close();
        catch (Exception ex)
            System.out.println(ex.getMessage());
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        try
            FileInputStream fi = new FileInputStream(getClass().getClassLoader().getResource("mypackage/preferences").getPath().replace("%20", " "));
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        catch (Exception ex)
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}If i run the JAR, i get the following error message,
{color:#ff0000}*file:\my jar path\jarname.jar!\mypackage\preferences (The filename, directoryname, or volume label syntax is incorrect)*{color}

Thanks sabre150,
sabre150 wrote:
You cannot update a running jar file. I am sorry. I didn't know about it. Thanks to point out.
There are two ways I approach this depending on my exact requirements -
1) use the java.util.prefs.Preferences APII will try this one
>
2) if not already present I copy the preferences file from the jar to a known place. I use a directory in the user's home directory and normally make the directory name the program with a '.' prefix.
One cannot access files in a jar file using the File API. One needs to use the getResource() or getResourceAsStream() methods on Class or ClassLoader.

How to read a file inside a jar

Hi All,
I have a jar file which consists of several XML. I need to read one of the xml.
If the XML are in a folder it is easy to read them by directly referencing them (e.g.:- "D/Test/Sample.xml";). But if these xmls are put in a jar file i am facing trouble in reading them.
Can anyone please suggest how to read such files. Also if the classes and jar are not in the same directory.
Any help in this regard will be highly appreciated.
Thanks,
Piyush

nikhil_vinay wrote:
yes i have already used "Class.getResourceAsStream ()". I guess it comes useful only when the class files and jar are in the same directory.No, wrong. The JVM has little or no concept of 'directories'
and instead relies on the classpath of the application to find
resources.
Due to some problem my jar files and my codes are in different directory. So add them to the apps' claspath and it will all be sweet. The original
responders advice will work just fine if the resource is on the classpath.
(Of course, that reply was assuming the resource was in a jar file.
If not, you will probably be needing to offer the user a JFileChooser
to access the file.)
Edited by: AndrewThompson64 on Mar 11, 2008 1:22 PM

Java Files inside the jar file cannot be read or accessed through Eclpse

The Java File inside the jar file of the eclipse cannot be accessed through the Eclipse . It shows error for the modules in the jar file .
But when compiled with adding the jar files to the class path the compilation is successful .
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import java.io.*;
import java.util.Enumeration;
// jar stuff
import java.util.jar.*;
import java.util.zip.ZipEntry;
public class Jaris
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       try
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       catch (Exception e)
            jf=null;
            throw(e);
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       ZipEntry ze=null;
       try
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             if ( je.getName().matches(".*\\"+matchString) )
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                ze=jf.getEntry(filename);
      catch (Exception e)
         throw(e);
      InputStream is = jf.getInputStream(ze);
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   // for testing the Jaris methods
   public static void main(String[] args)
      try
           String jarFilename=getJarfileName();
           Jaris jis = new Jaris(jarFilename); // this is the string we got from the other method listed above
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      catch (Exception e)
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}Happy coding! :)
Doc

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I have my j2me application in a .jar file , and my application needs to read a .txt file which is outside my .jar but in the same directory.
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InputStream input = getClass().getResourceAsStream("/myfile.txt");
as well as
InputStream input = getClass().getResourceAsStream("myfile.txt");
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Thanks in advance!

Thanks sabre150,
sabre150 wrote:
You cannot update a running jar file. I am sorry. I didn't know about it. Thanks to point out.
There are two ways I approach this depending on my exact requirements -
1) use the java.util.prefs.Preferences APII will try this one
>
2) if not already present I copy the preferences file from the jar to a known place. I use a directory in the user's home directory and normally make the directory name the program with a '.' prefix.
One cannot access files in a jar file using the File API. One needs to use the getResource() or getResourceAsStream() methods on Class or ClassLoader.

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You can use getClass().getResource(classpath)
to get a stream version of the data from your
jar file. If you need to put it in a file, you
can write that stream to a file in a temp directory.
classpath is the classpath of your js file

Need signed applet to read a file in the jar?

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thanks and sorry for my english

Image image = Toolkit.getDefaultToolkit().getImage(getClass().getResorce("FileName.jpg"));i need to make something like this
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How to read from file just the 2nd line onwards?

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This will read the file witout the first line:
import java.io.*;
import java.util.*;
public class Read2
public static void main (String[] args)
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}       Noah

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othe option
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How to read some files inside the jar

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