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Java Forum / General / July 2006Aside from googling....
and searching through the results, is there any one place where it is possible to look up the library required to satisfy an import. Example, A program wants to import javax.jnlp but the package is part of another library, not on the standard build path (under Eclipse). So I need to add a library to the build path...but how to find out which one... is there one place that has this information available? > and searching through the results, is there any one place where it is > possible to look up the library required to satisfy an import. [quoted text clipped - 5 lines] > add a library to the build path...but how to find out which one... is > there one place that has this information available? I don't know of any such directory, but it may be a good idea to put something like that up ... I am thinking of a rather simple index, where you could enter a class name and the directory would show all known jar libraries that contain such a class (and possibly allow to download the libs directly, since most of them are OSS anyway) ... maybe a good idea ... /philipp > > and searching through the results, is there any one place where it is > > possible to look up the library required to satisfy an import. [quoted text clipped - 14 lines] > > /philipp So how would a project like this get started? Is there some sort of Open Source Project that can be suggested? >> and searching through the results, is there any one place where it is >> possible to look up the library required to satisfy an import. [quoted text clipped - 14 lines] > > /philipp Shouldn't library requirements be in the documentation? If you're using an application, plug-in, or other library that doesn't document it's requirements clearly and precisely, I'd suggest a stern note to the authors about things they should have learned in their lower division courses, and then deleting the darn thing off your hard drive. >>> and searching through the results, is there any one place where it is >>> possible to look up the library required to satisfy an import. [quoted text clipped - 20 lines] > authors about things they should have learned in their lower division > courses, and then deleting the darn thing off your hard drive. Agreed, but alot of the books I have still are using the hard way to create the jar's or war's or ear's. I use eclipse as much as possible, so I'd like to be able to know what packages I have to add to my classpath to handle the imports. >>>> and searching through the results, is there any one place where it is >>>> possible to look up the library required to satisfy an import. [quoted text clipped - 23 lines] > so I'd like to be able to know what packages I have to add to my > classpath to handle the imports. If a centralized database could be set up in a suitable format, maybe there could be an Eclipse plug-in that would react to not finding an import by recommending a package to add. It could start by searching local disks for the package, and if that fails, ask whether to download it. Patricia I agree that JAR dependencies should be (and probably most often are) documented, but I guess doing a quick query on a well-known database could solve the occasional "but is this damn thing looking for" problem a lot quicker than having to scan the documentation for it... Well, how would you get started? I guess the first thing would be to come with a good name for it :-) register a domain and a server (perhaps with quite some bandwidth, if the service catches on), and think about how you can finance the project. Then you would start to collect well-known Java libraries (the Sun ones, the Apache ones, etc...), write a Java app or script (Groovy might be be cool for that) that can automatically scan a Java Jar file (or ear, or war, or whatever) for the classes, packages, whatever, that it contains and outputs this information to a database or XML format. Then you would think about how you can make the information accessible on your web page, for humans as well as in an A2A way (Web Services anyone??) ... and so forth ... I think the most interesting question to solve is the "financing" part - technically it should be rather painless really ... If anybody is interested in going for a project like that you could drop me a short email (philipp DOT leitner AT gmx DOT at) ... I won't be able to take the lead, but I might have the time to commit a little input to the project. /philipp > I agree that JAR dependencies should be (and probably most often are) > documented, but I guess doing a quick query on a well-known database [quoted text clipped - 21 lines] > be able to take the lead, but I might have the time to commit a little > input to the project. Sounds like a Java equivalent of RPMfind (http://rpmfind.net/). Dan.  SignatureDaniel Dyer http://www.dandyer.co.uk I did a google search for "jar file scan" and found this program... http://www.inetfeedback.com/jarscan/ haven't tried it yet I'm going to give it a shot and see if I can come up with something...maybe for starts an excel/oo spreadsheet in pdf format and put it on my website... > > I agree that JAR dependencies should be (and probably most often are) > > documented, but I guess doing a quick query on a well-known database [quoted text clipped - 25 lines] > > Dan. > I did a google search for "jar file scan" and found this program... > http://www.inetfeedback.com/jarscan/ > > haven't tried it yet hmm, looks as if it scans only your local disc though - would be pretty useless then, I'm afraid ... /philipp > > I did a google search for "jar file scan" and found this program... > > http://www.inetfeedback.com/jarscan/ [quoted text clipped - 5 lines] > > /philipp I have started working on something.... basically I'm executing a jar tf on each and every jar file on my system that may contain a package.... once I have it all done, I'll try to create a PDF out of it and put it somewhere..... > > I did a google search for "jar file scan" and found this program... > > http://www.inetfeedback.com/jarscan/ [quoted text clipped - 5 lines] > > /philipp I have started working on something.... basically I'm executing a jar tf on each and every jar file on my system that may contain a package.... once I have it all done, I'll try to create a PDF out of it and put it somewhere..... > >>>> and searching through the results, is there any one place where it is > >>>> possible to look up the library required to satisfy an import. [quoted text clipped - 30 lines] > > Patricia I did alot of grunt work to create a single file where you can search for a class, then go back to find the jar then go back to find the directory where the jar sits. Now mind you this is only for my PC, but as long as you can find a jar file, you should be able to search your harddrive for it... The problem is, the file is 10meg large and is a bit to big to load into one html document (although it does work). I've got to come up with another way....I wonder if there is a way to create a database out of it and query it that way..... hmmmm..... back to the drawing boad I agree, http://www.javasubscribedlinks.com is very good for this - its free to subscribe and once signed up you can type a fully qualified classname in Google (when logged into your Google account) and get links to find jar files containing that class at the very top of your search results. You can also sign up by the "Java Subscribed Links" profile in the Google co-op directory, at http://www.google.com/coop/directory?cx=information > Print Guy wrote: > > and searching through the results, is there any one place where it is > > possible to look up the library required to satisfy an import. > > Example, > > A program wants to import javax.jnlp but the package is part of another > > library, not on the standard build path (under Eclipse). So I need to > > add a library to the build path...but how to find out which one... is > > there one place that has this information available? > and searching through the results, is there any one place where it is > possible to look up the library required to satisfy an import. [quoted text clipped - 5 lines] > add a library to the build path...but how to find out which one... is > there one place that has this information available? You can search for Jarfiles/Classes on the site http://www.whatjar.net/index.jsp, but a search for javax.jnlp leads to no result. But it seems, that you can add jarfiles to their database. > > and searching through the results, is there any one place where it is > > possible to look up the library required to satisfy an import. [quoted text clipped - 5 lines] > > add a library to the build path...but how to find out which one... is > > there one place that has this information available? Google has a new service in beta called Google Co-Op: http://www.google.com/coop if you sign up for the service and then register the javasubscribedlinks.com . Just go ahead and type javax.jnlp into the google search bar and it finds: Class/Interface Name javax.jnlp.BasicService javax.jnlp.ClipboardService javax.jnlp.DownloadService javax.jnlp.DownloadServiceListener javax.jnlp.ExtendedService javax.jnlp.ExtensionInstallerService javax.jnlp.FileContents javax.jnlp.FileOpenService javax.jnlp.FileSaveService javax.jnlp.JNLPRandomAccessFile javax.jnlp.PersistenceService javax.jnlp.PrintService javax.jnlp.ServiceManager javax.jnlp.ServiceManagerStub javax.jnlp.SingleInstanceListener javax.jnlp.SingleInstanceService javax.jnlp.UnavailableServiceException (they appear as links) Click on one of the links and it gives you: javaws.jar BEA WebLogic Platform 8.1 <install-dir>\jrockit81sp3_142_04\jre\javaws javaws.jar J2EE 1.4 SDK and Sun Java System Application Server Platform Edition 8 Update 1 <install-dir>\jdk\jre\javaws javaws.jar J2SE JDK 5.0 <install-dir>\jre\lib javaws.jar JBuilder 2005 Enterprise <install-dir>\jdk1.4\jre\javaws jnlp.jar J2SE JDK 5.0 <install-dir>\sample\jnlp\servlet a list of jar names and their associated projects. 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