Locating specific packages in .jar files

If I need to include a few optiona packages, javax.net.ssl.*, java.security.cert.*; how can you tell which jar file these are packaged in?

Haven't tried. But still worth having a look into this free plug-in for Eclipse.
http://www.icewalkers.com/Linux/Software/520170/JAR-Class-Finder.html
Thanks
Venkat

Similar Messages

How to package other jar files into one jar?

How to package other jar files into one jar? How can i get the class in the inner jar file?

Generally not a good idea. The Java runtime won't be able to load classes from those "inner" jars, you'd have to write your own classloader to do that. It's not a brilliant idea, generally, anyway, since the point of having lots of jars is to keep your application modular. Bundling them all together like that means you have to re-deploy the whole thing to fix, for instance, one small bug in one small library
If you really want to do this, there's an Eclipse plugin called FatJar, but I urge you to consider whether you really want to do it first.

Problem with JSP using bean packaged in jar file

Hi,
          I am trying to use a java bean in a jsp file. The java bean is packaged
          into a jar file. I am getting class not found compilation error. If the
          bean remains to be a seperated class file, everything work well.
          Does anyone know how I can use bean in a jar file within jsp , i.e. to
          allow the bean to be found during compilation ?
          Thanks,
          Terence.
          [email protected]


Jacek,
          Thanks for replying.
          My JSP's are just files in my document root . However, I found a solution to
          my
          problem. That is to have the jar file defined in my weblogic.class.path. I may
          have missed some files in my original jar file which causes my problem.
          Mayby I should package everything into a web application for deployment. That
          will be my next step.
          Thanks anyway.
          Terence.
          Jacek Laskowski wrote:
          > Terence Lai wrote:
          > >
          > > Hi,
          > >
          > > I am trying to use a java bean in a jsp file. The java bean is packaged
          > > into a jar file. I am getting class not found compilation error. If the
          > > bean remains to be a seperated class file, everything work well.
          >
          > How do you use the JSP file ? Is it a part of web application ? If so,
          > the bean jar package should be located in WEB-INF/lib directory. It's
          > also recommended to put the bean class into a package, so it's not in
          > 'unnamed' package, and <jsp:useBean> can find it.
          >
          > >
          > > Does anyone know how I can use bean in a jar file within jsp , i.e. to
          > > allow the bean to be found during compilation ?
          >
          > see above.
          >
          > > Terence.
          >
          > Jacek Laskowski
          > HP Consulting

How to use Stylesheets packaged in JAR file

Hi,
I would like to package XSL files in a JAR. The stylesheet may import other XSL files. For example:
<xsl:import href="demos.xsl">
<xsl:import href="table.xsl">
where the original stylesheet and the imported stylesheets (demos.xsl and table.xsl) are all located in this package: com.company.xsl
Is there a way for the transformers to retrieve the files from the JAR?
Possibly another complication is that this JAR file is loaded at runtime.
Any suggestions would be of great help. Thanks!

Thanks that worked.
However, is it possible to use a relative path? Right now it only works if the absolute path is used:
<xsl:import href="jar:file:///c:/applications/bin/myjar.jar!/com/company/xsl/table.xsl" />
It would be nice if this worked instead:
<xsl:import href="jar:file:///./bin/myjar.jar!/com/company/xsl/table.xsl" />

Locating classes given many JAR files

This may seem a basic thing, but I'm having trouble figuring out how people locate the correct JAR file to include when given just the package and class name.
In searching for a solution to a problem I'd come across web document that tell me all about a particular class or set of classes that will solve this or that problem. The document goes on to give me the package name that the class(es) belong to. The problem is, these classes are in a JAR file and the document doesn't tell me the name of the JAR file or where to get it - assuming I don't have it.
Assuming I do have the JAR file, that JAR file is usually in a directory with many more JAR files (for example, WSAD includes a whole bunch of JAR files or me). What's the best way to locate the package and/or class file(s) within all these JAR files? Why don't authors tell us the name of the JAR file these class(es) are in? Does anyone else have this problem besides me?

Haven't tried. But still worth having a look into this free plug-in for Eclipse.
http://www.icewalkers.com/Linux/Software/520170/JAR-Class-Finder.html
Thanks
Venkat

How to modify a specific class in jar file ?

I've downloaded a jar file for applet, the jar file works fine... but when I extract a specific class file from the jar file and just recompie it from my IDE (Eclipse) without even making any change and then compress again jar class files including the new modified class file instead of the old one (without any modifications to other classes)... then I get
(NoSuchMethodError ) exception whenever methods of other classes are invoked from within the modified class !!
...The manifist file of the jar file reads the following line
Created-By: 1.4.0_01 (Sun Microsystems Inc.)
I thought it means that jar class files were built using JDK 1.4.0_01 ...I used JDK 1.5.0_01 in my IDE...
I thought JRE incompatiblity was the reason of the problem so I downloaded JRE 1.4.0_01 and used it to build this class file... but i got the same exception..
so what is the main reason of the problem ? ...should I make changes to IDX files accompanying applet jar files ??
If no, then how can I overcome this problem and be able to change and rebuild a specific class from this jar file ?
(I cannot rebuild all classes in jar because there are errors I cannot resolve !!)

Could you please clarify: do you want to run your project or a project from an independent jar?
In the first case just select Run Project from the project context menu or select a class with main method and click Run File in the class context menu.
Regarding the second case:
- I don't think there is such a feature in the IDE (running third party jars is not an IDE function). Could you explain why you need this?

How to use packages and jar files for applet?

Hi!
My applet takes a class say a.class.
Now this class depends on other classes that are packaged
in a directory and put separately.
I want to put this applet on the web.
So how do I manage the .class files in he package.
I have tried using jar file format.But I was not able to get it working.
Can someone please help me?
Thanks

Use Archive instead of codebase:
<APPLET CODE="MyApplet.class" ARCHIVE="MyApplet.jar" WIDTH=400 HEIGHT=300></APPLET>

Importing packages from jar file

Hi all,
I have a jar file that contain a package . And i set the clathpath with the path of jar file including the jar file name. And when I import the package i have an error that package does not exist. And I don't know why.

1.) did you spell the path + name of the JAR file correctly?
2.) Did you spell the package name including capitalization correctly?
3.) Is the package hierarchie in the JAR the same as the package names?

Package in JAR file ?

Hi !
If I have created a package called xyz, how do I put that in a JAR file, should the subdirectory xyz be included in the JAR (xyz/class.class...) , or do I put the JAR file in a subdirectory named xyz ?
Mikael

The subdir should be in the jar, not the other way round.
To achieve this, create the jar with "jar -cf newjar.jar xyz" from the parent of xyz-directory.

Location of SunServer7 Servlet.jar file?

Hello All I have AppServer7 development edition installed on my machine and I'm trying to compile a simple helloworld servlet to test my installation, but I can't seem to find servlet.jar in the AppServer7 directory structure. Any ideas which file has the servlet interfaces?
Thanks,
Coop

The forum for AppServer questions is:
http://swforum.sun.com/jive/forum.jspa?forumID=114
Having said that, did you check under server_root/jwsdp/common/lib directory?
Thanks
Manish

Location of downloaded .jar files?

When I was using the java in the jre package, downloaded .jar files would go to ~/.java I have switched to the openjdk6 package and I have no idea where downloaded .jar files go now... it seems as though they are cached in memory and not saved to disk at all. Are they saved somewhere?

openjdk and jre don't do the same.
openjdk is a jdk (Java Development Kit) and jre is Java Runtime Environment.
And the files should be downloaded into your download directory which you've either set manually or is maybe $HOME/Download.

Calling class or jar file location

I created one set of java api for third party application to call. How do I found out that the location of third party jar file or class file that call my api? Please advise.

If you don't know what called your program, then there is no way.

Packaging jar files

what is the recommeded packaging of jar files
i.e.
-by api
-by functionality
-by package
-by subpackage

Jar files are always packaged by the package structure.
The jar files must have classes in directory structure which matches the their respective package declaration.
ex. if you have a file called Hello.java with the package com.test.myapp
the the jar file must have this file in the following directory structure
com/test/myapp/Hello.class
Otherwise, the class loader will not be able to load your classes.
regards,
Abhishek.

Execution from JAR files and Classpaths -- Help

I am confused about how classes are resolved when running from within a JAR file, and why this is different than running a class that is not inside a JAR file.
I have an application that uses classes from a third party library stored in a JAR file (biojava.jar) . If I run the app from the class file it works as expected and is capable of finding the external classes when the path to the biojava.jar is on my classpath. It also works if biojava.jar is instead placed in the extensions folder jre/lib/ext folder without an explicit path entry in my classpath.
However when I package all my application classes up in a JAR file and try to execute the application from the JAR file it will ONLY work if I add a manifest entry to myApp.jar ... Class-Path: biojava.jar AND I place the file biojava.jar in the SAME directory as the Packaged JAR application. I would like to find a way to make this JAR file work for anyone who has biojava.jar in their classpath or ext directory. In other words I don't want my user community to have to copy the biojava.jar file when I email them myApp.jar. This community will already have biojava.jar on their CLASSPATH.
How can I make my app within a JAR recognize either the user's CLASSPATH or ext folder? I have tried reading the documentation and many experiments but the only way it works is as described above.
I am running Running Windows 2000.
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)
Here are the results of my experimentations:
The following Works:
Manifest: Main-Class: org/biojava/app/SequenceSpiral
Manifest: Class-Path: biojava.jar
Place biojava.jar in the same directory as SequenceSpiral.jar
java -jar SequenceSpiral.jar
This works perfectly
NONE of the following work
0) Placing biojava.jar in my jre/lib/ext directory instead of the same dir as SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter
(this is the first class referenced from biojava.jar)
1) Just see if it will find the proper jar on my classpath
Manifest: Main-Class: org/biojava/app/SequenceSpiral
I have biojava.jar on my classpath but not in same directory as SequenceSprial.jar
java -jar SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter
2) Specify the name if the jar in the Manifest Classpath and see if it will find the proper jar on my classpath
Manifest: Main-Class: org/biojava/app/SequenceSpiral
Manifest: Class-Path: biojava.jar
I have biojava.jar on my classpath but not in same directory as SequenceSprial.jar
java -jar SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter
3) Specify the path of the jar in the Manifest Classpath
Manifest: Main-Class: org/biojava/app/SequenceSpiral
Manifest: Class-Path: d:/biojava/biojava.jar
I have biojava.jar on my classpath (D;\biojava\biojava.jar) but not in same directory as SequenceSprial.jar
java -jar SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter
(note that in this case it is not fnding my main even though the Main-Class is specified)
4) Specify current directory and biojava.jar in the Manifest Class-Path
Manifest: Main-Class: org/biojava/app/SequenceSpiral
Manifest: Class-Path: .;biojava.jar
I have biojava.jar on my classpath (D;\biojava\biojava.jar) but not in same directory as SequenceSprial.jar
java -jar SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter
5)Specify current directory and the URL of biojava.jar in the Manifest Class-Path
Manifest: Main-Class: org/biojava/app/SequenceSpiral
Manifest: Class-Path: . d:/biojava/biojava.jar
I have biojava.jar on my classpath (D;\biojava\biojava.jar) but not in same directory as SequenceSprial.jar
java -jar SequenceSpiral.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/biojava/bio/seq/FeatureFilter.
Thank you very much for any help or suggestions,
David Maynard

I did some more testing and I think I now understand what is going on.
I don't like it, but at least I understand it.
The problem: I have an app packaged into a JAR file, myApp.jar. It has a dependancy upon an external JAR file extern.jar.
extern.jar is on my Classpath (and also in jre/lib/ext)
1) For some reason (bug?) java -jar myApp.jar does NOT use the classpath or the jre/lib/ext mechanisms to find .jar files needed to resolve references to external classes. This seems to be true even if you add an explicit -classpath argument on the command line!
thus
java -jar -cp c:\\absolutePathToMy\extern.jar myApp.jar
also fails as does
java -cp c:\\absolutePathToMy\extern.jar -jar myApp.jar
2) Inside the myApp Jar file you can specify a URL to an jar extension jar file but the URL IS RELATIVE TO THE PATH WHERE THE myApp.Jar is executed from! If I add the Manifest item Class-Path: ..\..\..\myexterndir\extern.jar then
java -jar myApp.jar
works correctly and resolves the external references.
This is why several people have reported that this class-path mechanism works ONLY when the extern.jar file is in the SAME DIRECTORY as the myApp.jar file when they had added a Class-Path: extern.jar to the Manifest.
However together these two items make it IMPOSSIBLE to distribute myApp.jar to others and have it work since the path names statically encoded inside the jar are relative to where the jar gets executed from. If I move myApp.jar to a different location on my hard drive it may also fail.
In my case I know all my customers already have extern.jar (5MB) installed on their classpaths and I would like to just send them the myApp.jar ( .5MB ).
However I don't see how to do this given the current specification of a JAR file, and the bug that makes all -jar file act like they have the Sealed=true property.
I tried explicity setting Sealed=false in the manifest but this didn't seem to have any effect.
I hope that this will save others the many hours of time it has taken be to determine that JARS are not well suited for deploying apps with dependenncies on external libs.
I also hope that someone can show me how execute a JAR and specify a classpath that doesn't get IGNORED my the classloader used in loading the jar classes.
This is using java version:
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)
Does any one know this bug is fixed in a later release?
David Maynard

Error while deploying a JAR-File into 8i !

Hello to all Oracle experts,
At the attempt to deploy a Jar file into the 8i the following
error message comes onto Shell level:
initialization complete
loading : com/sun/xml/tree/XmlDocumentBuilder
ORA-01536: space quota exceeded for tablespace 'PROCON_DATA'
Error while loading com/sun/xml/tree/XmlDocumentBuilder
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SYS.DBMS_LOB", line 700
ORA-06512: at "PROCON.LOADLOBS", line 1
ORA-06512: at line 1
creating : com/sun/xml/tree/XmlDocumentBuilder
Error while creating class com/sun/xml/tree/XmlDocumentBuilder
ORA-29509: incorrectly formed Java binary class definition
The command was:
loadjava -user procon/procon@t2srv1:1521:PROCON -thin -verbose -schema PROCON xml_un.jar
It would please me if somebody has an idea to this error !
null

Hi Olivier,
you could try the following approach:
1. Package your JAR files as J2EE Engine libraries and deploy them on it as described here: <a href="http://help.sap.com/saphelp_nw04/helpdata/en/9f/2ade3fc6c6ec06e10000000a1550b0/frameset.htm">Working with J2EE Libraries</a>.
2. Set reference to this library from the application that use them. Depending on your application, refer to the appropriate documentation:
-- reference from a J2EE app -> see <a href="http://help.sap.com/saphelp_nw04/helpdata/en/15/d5d93fe80fed06e10000000a1550b0/frameset.htm">Referencing Libraries in Applications</a>
-- reference from a portal app -> see <a href="http://help.sap.com/saphelp_nw04/helpdata/en/02/788540ae1dbb4de10000000a1550b0/frameset.htm">Referencing Elements</a>
Hope that helps!

Locating specific packages in .jar files

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