Java: Packaging Self-running Jar

This is a discussion on Java: Packaging Self-running Jar within the Tech Board forums, part of the Community Boards category; I'm trying to package my Java app into self-running jar file. But it always says "Could not find the main ...

  1. #1
    unleashed alphaoide's Avatar
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    Sep 2003
    Posts
    696

    Java: Packaging Self-running Jar

    I'm trying to package my Java app into self-running jar file. But it always says "Could not find the main class." If you could take a look of the process and tell me what I did wrong, that would be greatly appreciated.

    Files structure:
    Code:
    manifest.mf
    TaskManager/
        data.xml
        bin/
            TaskManagerFrame.class
            Task.class
            Organizer.class
        doc/
        images/
            delete-task.png
            new-task.png
            print.png
        src/
            TaskManagerFrame.java
            Task.java
            Organizer.java
    The main method is in TaskManagerFrame, and the content of manifest.mf is the following.
    Code:
    Manifest-Version: 1.0
    Class-Path: TaskManager/bin/
    Main-Class: TaskManager/bin/TaskManagerFrame
    The command to produce the jar file follows.
    Code:
    jar cmvf manifest.mf taskmanager.jar TaskManager
    The jar file is produced, but when double-clicked, it says "Could not find the main class."
    source: compsci textbooks, cboard.cprogramming.com, world wide web, common sense

  2. #2
    #include<xErath.h> xErath's Avatar
    Join Date
    Jun 2004
    Posts
    722
    shouldn't be
    Main-Class: TaskManager.bin.TaskManagerFrame
    like a import directive ??
    but TaskManager.bin are interpreted as packages so you can try also
    Main-Class: TaskManagerFrame

    In any case, first of all the manifest.mf file must be inside meta-inf/ directory

    extra: a jar file is a zip file
    And I don't work with java for some long time...
    Last edited by xErath; 06-29-2005 at 10:37 PM.

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