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Editorial Team
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Asked: 2026-06-04T07:10:13+00:00

I have written a quick Java wrapper that fires off the NMAP executable and

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I have written a quick Java wrapper that fires off the NMAP executable and waits for it to finish. I am using Eclipse. I would like to include the NMAP source/executable
in my Java jar file so that I have a self-contained package.

Within Eclipse I have added the NMAP folder hierarchy. Within Eclipse I can see Java firing off the NMAP utility correctly, and waiting for the utility to end before exiting.
So far, so good. I then export a JAR file for with eclipse. I can see the NMAP folder hierarchy present. However when I try to run the JAR file it is having trouble finding nmap.exe. Can a foreign executable be called from with a jar file? if not, what are
my options? If so, why can’t it find it within the jar file when it could find it within Eclipse?

Thanks.

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1 Answer

  1. Editorial Team

    You will need extract the .exe and its required support files onto the disk before you can access them as regular files (which execution through standard methods requires, I believe). You can look up examples of how to copy a resource from a jar to a file using getResourceAsStream() on one of your class files in the jar.

    Once extracted, you can execute is as you are doing now (you might need to ensure execution rights, etc. based on your OS)

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