AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  problem with external JARs          AppletTalk.com Forum Index -> Java Help View previous topic :: View next topic   Author Message Abs Guest Posted: Sun May 30, 2004 10:41 pm    Post subject: problem with external JARs Hi! I'm developing a Java app using the Eclipse IDE. My app uses some external JARs to work. The app runs fine from the IDE, I suppose Eclipse takes care of all the dependencies. But, when I try to run it from the command line, it cannot find the JARs. Is there a way to run a Java app that depends on other JARs without having to alter the classpath variable to add all the external libraries that an app uses ? Regards -- Abs Back to top Ryan Stewart Guest Posted: Sun May 30, 2004 10:59 pm    Post subject: Re: problem with external JARs "Abs" <abs (AT) terra (DOT) com> wrote Quote: Hi! I'm developing a Java app using the Eclipse IDE. My app uses some external JARs to work. The app runs fine from the IDE, I suppose Eclipse takes care of all the dependencies. But, when I try to run it from the command line, it cannot find the JARs. Is there a way to run a Java app that depends on other JARs without having to alter the classpath variable to add all the external libraries that an app uses ? Regards Please do not multipost. That's the whole purpose of the classpath. Otherwise how does Java know where to find the classes it's looking for? Back to top VisionSet Guest Posted: Sun May 30, 2004 11:15 pm    Post subject: Re: problem with external JARs Quote: "Abs" <abs (AT) terra (DOT) com> wrote Hi! I'm developing a Java app using the Eclipse IDE. My app uses some external JARs to work. The app runs fine from the IDE, I suppose Eclipse takes care of all the dependencies. But, when I try to run it from the command line, it cannot find the JARs. Is there a way to run a Java app that depends on other JARs without having to alter the classpath variable to add all the external libraries that an app uses ? "Ryan Stewart" <zzanNOtozz (AT) gSPAMo (DOT) com> wrote Quote: Otherwise how does Java know where to find the classes it's looking for? It looks in the jre/lib/ext directory. Put your JARs there. This maybe a little trickier if you are deploying this over many clients, and then again maybe not. -- Mike W Back to top Roedy Green Guest Posted: Mon May 31, 2004 12:02 am    Post subject: Re: problem with external JARs On Sun, 30 May 2004 17:59:41 -0500, "Ryan Stewart" <zzanNOtozz (AT) gSPAMo (DOT) com> wrote or quoted : Quote: Is there a way to run a Java app that depends on other JARs without having to alter the classpath variable to add all the external libraries that an app uses ? yes, you can specify the jars or the classpath on the command line. you can also put jars in the ext directory. See http://mindprod.com/jgloss/classpath.html -- Canadian Mind Products, Roedy Green. Coaching, problem solving, economical contract programming. See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. Back to top Oscar kind Guest Posted: Mon May 31, 2004 10:40 pm    Post subject: Re: problem with external JARs Abs <abs (AT) terra (DOT) com> wrote: Quote: I'm developing a Java app using the Eclipse IDE. My app uses some external JARs to work. The app runs fine from the IDE, I suppose Eclipse takes care of all the dependencies. But, when I try to run it from the command line, it cannot find the JARs. Is there a way to run a Java app that depends on other JARs without having to alter the classpath variable to add all the external libraries that an app uses ? When you put your classes in a JAR file, that JAR file has a manifest. You can use the default manifest, and add two headers to it to create a "self-contained" application: Main-Class: package.to.MainClass Class-Path: library1.jar library2.jar The Class-Path header contains relative URL's to the JAR files. IN the example above, it looks for the JAR files it depends on in the current directory. As pointed out by others, you can also place the JAR files you depend upon in the lib/ext subdirectory of the directory the JRE resides in. Personally, I prefer the first approach however; it's easier to uninstall (as no other application will use your files). Oscar -- Oscar Kind http://home.hccnet.nl/okind/ Software Developer for contact information, see website PGP Key fingerprint: 91F3 6C72 F465 5E98 C246 61D9 2C32 8E24 097B B4E2 Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> Java Help All times are GMT Page 1 of 1   Jump to: Select a forum Java Newsgroups----------------Java DiscussionsWeb-based java games comp.lang.java 3D Graphics API's for Java Java: Support and criticism Java System Announcements comp.lang.java.api JavaBeans Java and CORBA Java and Databases comp.lang.java.developer Java GUI Toolkits Java Help comp.lang.java.javascript JVM, native methods and hardware comp.lang.java.misc Java Language Programming Security and Java comp.lang.java.setup Java Software Tools comp.lang.java.tech ibm.software.java.linux  Non-English Java Newsgroups----------------Java Language (German)Language Java (Français)Java (Italian)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.