Question

How to run Jar files.....

Asked by: imarshad

Hi all,
        I have been given a JAR file that is supposed to run. I have got no experience what so ever with Java. I want to know how to run this file???? Following is what I have already tried .....

java -jar myFile.jar
Failed to load Main-Class manifest attribute from
myFile.jar

Then I unzipped the Jar file with WinRAR and then found the following files in the archive.....

icon.png
logo.png
scroll.png
intro.midi
myFile.class
gfxcanvas.class
META-INF (Folder with the file MANIFEST.MF)

Now I tried to execute the class files using the following code.....

C:\myGen>java myFile
Exception in thread "main" java.lang.NoClassDefFoundError: javax/microedition/mi
dlet/MIDlet
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

also I tried

C:\myGen>java myFile.class
Exception in thread "main" java.lang.NoClassDefFoundError: myFile/class

and here is the MANIFEST.MF file if it helps.....

Manifest-Version: 1.0
MicroEdition-Configuration: CLDC-1.0
MIDlet-Name: myFile
Created-By: 1.4.2_03 (Sun Microsystems Inc.)
MIDlet-Vendor: Sun Microsystems
MIDlet-1: myFile, icon.png, myFile
MIDlet-Version: 1.0
MicroEdition-Profile: MIDP-2.0


Can someone suggest some way to run this program???? How can I be sure that this is some bogus file that cant be run?????

Imran

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Asked On
2005-11-10 at 22:25:02ID21627361
Tags

run

,

jar

,

how

,

files

Topic

Java Programming Language

Participating Experts
3
Points
500
Comments
8

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    Answers

     

    by: objectsPosted on 2005-11-10 at 22:27:47ID: 15271761

    It appears to be a midlet jar for running on a handheld device such as a mobile phone.
    What are you trying to run it on?

     

    by: imarshadPosted on 2005-11-10 at 22:30:24ID: 15271767

    I am trying to run it on my Windows XP machine..... Although I have a Symbian based P910i device. How can I test it on my device? Simply copy and run?

    Imran

     

    by: objectsPosted on 2005-11-10 at 22:36:03ID: 15271783

    try copying it to your handheld
    you'll need an emulator to run it on xp

     

    by: objectsPosted on 2005-11-10 at 22:37:39ID: 15271787

     

    by: imarshadPosted on 2005-11-10 at 22:48:22ID: 15271812

    I copied the jar file to my device and simply ran it. It installed itself but when I try to run I get the error

    Program Closed
    Program  jes-5c5-javax.microedition.lcdui1@1420c7
    Reason Code KERN-EXEC
    Reason number 3

    Is ther anything I can do with it or it is a corrupt file??

    Imran

     

    by: objectsPosted on 2005-11-10 at 23:11:39ID: 15271855

    No idea sorry, perhaps its not meant to run on your particular device.

     

    by: haduyPosted on 2008-06-07 at 07:12:13ID: 21735545

    Add new properties to MANIFEST.MF
    Main-Class: package.myFile

    This tell application  package.myFile  as start point

    or run by command.

    java -jar java -jar myFile.jar myFile

     

    by: PLANET_LTDPosted on 2009-03-14 at 16:41:01ID: 23889118

    May be you can use Eclipse IDE to generate an executable JAR file.

    20120131-EE-VQP-002

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