Re: jar execution problem

Knute Johnson <>
Wed, 25 May 2011 08:48:20 -0700
On 05/25/2011 08:25 AM, Sascha wrote:


i got a problem with execution of jar files.

I used the following command to create a jar file.
jar -vcfm dice.jar MANIFEST.TXT dice

In the folder dice the Dice.class is located.

The file MANIFEST.TXT contains only the following line
Main-Class: Dice

When I try to execute the jar file with
java -jar dice.jar

I got the error message
Exception in thread "main" java.lang.NoClassDefFoundError: Dice

I hope somebody else got the same problem and can help me out.

Thanks in advance for the help.

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Does your Dice source file have a package statement? If you are running
the jar program from the directory above dice it will store the class
files as dice/Dice.class and that must match with the package statement
in the source file.

So as not to ask you a lot of questions, do this:

1) put your source files in the dice directory.
2) put a 'package dice;' statement in all source files
3) compile from the directory above dice with 'javac dice/'
4) put the manifest file in dice and
    in it put the line 'Main-Class: dice.Dice'
5) run the jar program from the directory above dice with
    'jar -cvfm Dice.jar dice/manifest dice/*.class dice/anyotherfiles'
    I usually keep my manifest file in the same directory but it isn't

You can use the 'e' option and skip using a manifest file it the only
thing in it is the Main-Class statement.


Knute Johnson

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