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Thread: java -jar path problem

  1. #1
    Junior Member lostbits's Avatar
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    Default java -jar path problem

    win7
    cygwin 1.7.25

    I've done something dumb but I can't figure out what it is, sigh. I installed ANTLR into my /usr/local/lib (C:\cygwin\usr\local\lib), fixed the CLASSPATH variable so that ANTLR is first and put /usr/local/lib into my (cygwin) PATH variable. Java is installed into C:\Program Files\Java.

    Using a bash shell (in cygwin)
    java works
    java -jar /usr/local/lib/antlr.. does not work (Unable to access jarfile /usr/local/lib/antlr-4.1-complete.jar)
    cd /usr/local/lib
    java -jar antlr .. works just fine

    Under a DOS shell
    java works
    java -jar c:\cywin\usr\local\lib\antlr ... does not work

    What have I done wrong? What am I missing?


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: java -jar path problem

    java -jar antlr .. works just fine
    I didn't know that the -jar option would work without a jar file name. Are you sure that there isn't a jar file named antir in the directory where the java -jar command is issued?
    The following worked. BuildDoIt is a jar file that was renamed by removing the .jar:
     
     Directory of C:\Testing
     
    09/21/2004  03:18 PM            25,660 BuildDoIt
                   1 File(s)         25,660 bytes
                   0 Dir(s)  52,036,771,840 bytes free
     
    C:\Testing>java -jar BuildDoIt
     
    C:\Testing>
     
    C:\Testing>cd ..
     
    C:\>java -jar C:/Testing/BuildDoIt
     
    C:\>

    does not work
    Please copy the full contents of the command prompt window and paste it here.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: java -jar path problem

    Hello.
    I tried in Ubuntu.
    It worked well.
    Can you try again?

    Syed.

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    Default Re: java -jar path problem

    @syed Can you copy the contents of the console and post it showing the filename and the command line used?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: java -jar path problem

    Hello.
    Sure. Please find attached the screenshot. I wanted to attached the executable jar as well but looks like I can't do that.
    If you get any questions please let me know.
    The executable jar "Exec.jar" was available in the JarTest2 folder.
    I switched to some other directory. From there I executed the jar file.

    Thanks,
    Syed.Screenshot.jpg

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: java -jar path problem

    @Syed Can you COPY and PASTE the contents of the console window here? I can't do a FIND on text in an image.
    For example I want to see the java command:
    java -jar <Path to jar file>

    The main question I have is can you use the java -jar command without specifying the name of the jar file The OP/user implies that he was able to have it execute by giving the path to a folder, NOT the path to a jar file.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
    Junior Member lostbits's Avatar
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    Cool Re: java -jar path problem

    It's an environmental issue. Java is installed on a Win7 machine and expects a Win7 formatted path. I dislike Win-anything and run using a (cygwin) bash shell. Bash shell paths 'know' that the root is '/'. Java does not know that '/' means 'C:/'. And so, the mystery ends.

    Thank you all. You got me to think of a 'novel' way to (again) prove that I used to be smart, and then changed my mind.

    art

    ~ >> java -jar /usr/local/lib/antlr-4.1-complete.jar
    Error: Unable to access jarfile /usr/local/lib/antlr-4.1-complete.jar
    ~ >> java -jar 'C:\cygwin64\usr\local\lib\antlr-4.1-complete.jar' # or
    ~ >> java -jar c:/cygwin64/usr/local/lib/antlr-4.1-complete.jar

    ANTLR Parser Generator Version 4.1
    -o ___ specify output directory where all output is generated
    -lib ___ specify location of grammars, tokens files
    -atn generate rule augmented transition network diagrams
    -encoding ___ specify grammar file encoding; e.g., euc-jp
    -message-format ___ specify output style for messages in antlr, gnu, vs2005
    -long-messages show exception details when available for errors and warnings
    -listener generate parse tree listener (default)
    -no-listener don't generate parse tree listener
    -visitor generate parse tree visitor
    -no-visitor don't generate parse tree visitor (default)
    -package ___ specify a package/namespace for the generated code
    -depend generate file dependencies
    -D<option>=value set/override a grammar-level option
    -Werror treat warnings as errors
    -XdbgST launch StringTemplate visualizer on generated code
    -XdbgSTWait wait for STViz to close before continuing
    -Xforce-atn use the ATN simulator for all predictions
    -Xlog dump lots of logging info to antlr-timestamp.log

  8. #8
    Super Moderator Norm's Avatar
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    Default Re: java -jar path problem

    Bash shell paths 'know' that the root is '/'. Java does not know that '/' means 'C:/
    I have 3 drives on Win7: C:, D: and E: what would the root be for that?

    This worked for me:
     
    C:\>java -jar /Testing/BuildDoit
     
    C:\>
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
    Junior Member lostbits's Avatar
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    Default Re: java -jar path problem

    I hear you. The root I was talking about was the UNIX root, '/', established in cygwin. I put this root on the C: drive. Most specifically, C:/cygwin64 in DOS is '/' in cygwin. It appears that java does not understand that '/' really means C:/cygwin64. When I put my path in as "java -jar c:/cygwin64/usr/local/lib/antlr...jar" it works. Nothing else does.

    When you put in '/Testing/BuildDoit' I don't know what happen. I guess you are running under Win7 and that (you are saying) that Testing/BuildDoit is located on one of the drives, C:, D:, or E:, and that Win7 translates '/' to the appropriate drive and path? I don't know how you did it but it doesn't seem to work for me. So, how did you construct your system so that java recognizes the root, '/', and translates the root into the correct path? Where is Testing/BuildDoit located? Is the directory Testing located at C:/Testing or is Testing located at some other place (D:/.../Testing for example)?

    art

  10. #10
    Super Moderator Norm's Avatar
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    Default Re: java -jar path problem

    The post shows that I was in C: (root)
    The full path to the jar file: C:/Testing/BuildDoIt
    I guess java took the /Testing path to mean: start in the current location and go to the folder: Testing
    If you don't understand my answer, don't ignore it, ask a question.

  11. #11
    Junior Member lostbits's Avatar
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    Default Re: java -jar path problem

    Well, I aint an expert (as this post clearly shows) but that would be my guess. If you locate Testing/ at any other location (D:/Testing, E:/Testing, or C:/.../Testing) I would guess that it won't work.

  12. #12
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    Default Re: java -jar path problem

    I would guess that it won't work.
    That's right. The path/folder needs to be where the java program can see it.
    It would work if the current directory (where ever that is) contained a folder: Testing
    If you don't understand my answer, don't ignore it, ask a question.

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