java - executable jar file not running outside of the folder where I created it -

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i created jar file in working folder

jar -cfe mrmc.jar mrmc *.class *.jar db statpack

and able double click jar file or run using java -jar mrmc.jar

but when copy jar file location, can no longer run it. got errors:

exception in thread "main" java.lang.nullpointerexeption

it seems jar file did not find files in resource folder db above.

thank you.

i see 2 possible reasons:

a) content of db directory not end in jar. unzip jar check inside. note: jar zipfile.

b) not referencing files classpath resource, file resource. check methods using, if based on classpath or on file system.

see question different ways load file: how should load files java application?


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