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Thread: employing library jar from windows command line

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    Default employing library jar from windows command line

    I have never used a jar based library before. After having had problems getting javac to compile a .class properly, I got that figured out and got a successful compile with this batch file:


    C:\z\java\jdk1.6.0\bin\javac -classpath C:\z\marc4j\marc4j-2.4\lib\normalizer.ja
    r;C:\z\marc4j\marc4j-2.4\marc4j.jar %1.java

    To execute with java, I made this "run" batch file:

    C:\z\java\jdk1.6.0\bin\java -classpath C:\z\marc4j\marc4j-2.4\lib\normalizer.jar
    ;C:\z\marc4j\marc4j-2.4\marc4j.jar %1


    This produces the following response:

    Exception in thread "main" java.lang.NoClassDefFoundError: hw

    The source I'm compiling is called "hw.java" and looks like this:



    import org.marc4j.MarcReader;

    class hw
    {
    public static void main(String [] args)
    {
    System.out.println("It runs!");
    }
    }


    Everything seems ok to me, so where did I go wrong?


    TIA


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    Super Moderator copeg's Avatar
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    Default Re: employing library jar from windows command line

    C:\z\java\jdk1.6.0\bin\java -classpath C:\z\marc4j\marc4j-2.4\lib\normalizer.jar
    ;C:\z\marc4j\marc4j-2.4\marc4j.jar %1
    Did you jar up the file? YIf so, you have to specify the -jar option to the java command to run jars. If not, and this is just a .class file, remove the .jar extension when you try to run

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    Super Moderator Norm's Avatar
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    Default Re: employing library jar from windows command line

    Where is the hw.class file?

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    Default Re: employing library jar from windows command line

    Somebody else put it in a jar, I'm just trying to get it out. If I would have the source, I'd compile it the old fashioned way. Class files I'm pretty much used to, or at least they have worked until now. I will try -jar and see how it goes. Hmmm, so javac does not do it, but java does. Tricky. I appreciate the advice.

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    Super Moderator Norm's Avatar
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    Default Re: employing library jar from windows command line

    javac does not do it, but java does
    What is the "do it" you refer to?

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    Default Re: employing library jar from windows command line

    Quote Originally Posted by Norm View Post
    Where is the hw.class file?
    After javac runs successfully, hw.class appears by magic. same as usual. Sorry, I did not provide dir output along the way.

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    Default Re: employing library jar from windows command line

    Have a -jar extension/argument. Sorry for the imprecision.

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