AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  classpath and sourcepath          AppletTalk.com Forum Index -> Java Discussions View previous topic :: View next topic   Author Message Jack Black Guest Posted: Wed Jan 10, 2007 8:55 pm    Post subject: classpath and sourcepath I'm trying Java for the first time and haven't got very far. According to the literature, you can set the path that the compiler (javac) uses to find the source to be compiled. You just have to supply the path on the -classpath (or -sourcepath) parameters of javac. Well I've tried this many times in all sorts of combinations but it just doesn't work. This is what I type (my source is in D:\JavaClasses) javac -classpath D:\JavaClasses Javac returns the message javac: no source files If I then try to compile my program with javac MyProgram.java it says error: cannot read: MyProgram.java I've also tried setting CLASSPATH as an environmental variable with no better result.(set CLASSPATH=D:\JavaClasses) Can someone please confirm that -classpath is the right option and that it does in fact work the way I want it to? I can get my program to compile by changing directory to D:\JavaClasses so there's nothing wrong with my program or the compiler. Jack Back to top Lew Guest Posted: Sat Jan 13, 2007 8:10 am    Post subject: Re: classpath and sourcepath Jack Black wrote: Quote: I'm trying Java for the first time and haven't got very far. According to the literature, you can set the path that the compiler (javac) uses to find the source to be compiled. You just have to supply the path on the -classpath (or -sourcepath) parameters of javac. Well I've tried this many times in all sorts of combinations but it just doesn't work. This is what I type (my source is in D:\JavaClasses) javac -classpath D:\JavaClasses Javac returns the message javac: no source files If I then try to compile my program with javac MyProgram.java it says error: cannot read: MyProgram.java Have you tried specifying the classpath and the source files at the same time? Your first example shows a classpath but no source to compile, which could explain the "no source files" error message. The second one specifies the source but no sourcepath, which maybe made it hard for the compiler to find the source. I assume here that you did not "cd" to the D:/JavaClasses directory before invoking javac. If you did, then you have a different problem. What was your working directory when you invoked those commands? Assuming your classes are in the default package (stop doing that!), you could try javac -sourcepath D:/JavaClasses MyProgram.java This should locate your source even if you didn't "cd" first. The compiler "classpath" option locates the root of .class hierarchies, not source code. This is necessary when your compilation depends on classes outside your source directory. - Lew Back to top Jack Black Guest Posted: Sun Jan 14, 2007 3:48 pm    Post subject: Re: classpath and sourcepath Thanks for the reply Lew. Quote: Have you tried specifying the classpath and the source files at the same time? Yes I have. I have tried exerything I can think of. But you have cleared up for the difference between sourcepath and classpath. So thanks for that. Quote: I assume here that you did not "cd" to the D:/JavaClasses directory before invoking javac. If you did, then you have a different problem. What was your working directory when you invoked those commands? If I cd to D:\JavaClasses before invoking javac, it works fine. Anything else fails. Quote: Assuming your classes are in the default package (stop doing that!), you could try javac -sourcepath D:/JavaClasses MyProgram.java Well that's what I would have thought as well. It doesn't though. It doesn't seem to find the source unless I'm in the same directory. cheers Jack "Lew" <lew (AT) nowhere (DOT) com> a écrit dans le message de news: FMWdnS8tJoSkxzXYnZ2dnUVZ_vupnZ2d (AT) comcast (DOT) com... Quote: Jack Black wrote: I'm trying Java for the first time and haven't got very far. According to the literature, you can set the path that the compiler (javac) uses to find the source to be compiled. You just have to supply the path on the -classpath (or -sourcepath) parameters of javac. Well I've tried this many times in all sorts of combinations but it just doesn't work. This is what I type (my source is in D:\JavaClasses) javac -classpath D:\JavaClasses Javac returns the message javac: no source files If I then try to compile my program with javac MyProgram.java it says error: cannot read: MyProgram.java Have you tried specifying the classpath and the source files at the same time? Your first example shows a classpath but no source to compile, which could explain the "no source files" error message. The second one specifies the source but no sourcepath, which maybe made it hard for the compiler to find the source. I assume here that you did not "cd" to the D:/JavaClasses directory before invoking javac. If you did, then you have a different problem. What was your working directory when you invoked those commands? Assuming your classes are in the default package (stop doing that!), you could try javac -sourcepath D:/JavaClasses MyProgram.java This should locate your source even if you didn't "cd" first. The compiler "classpath" option locates the root of .class hierarchies, not source code. This is necessary when your compilation depends on classes outside your source directory. - Lew Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> Java Discussions 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.