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Editorial Team
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Asked: 2026-05-27T04:05:56+00:00

I made an executable jar that depends on other jars with the command prompt

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I made an executable jar that depends on other jars with the command prompt using the format

jar cvfm MyJarName.jar manifest.txt *.class dependentJar1.jar dependentJar2.jar

The jar was made properly and everything seemed fine… But when run, it gets runtime errors because it can’t find the class files that my project refers to. Exploring the created jar, the other 2 jars that it depends on are in there just as they should be and they are listed in the manifest.mf class path, but for some reason java is dumb and doesn’t actually look inside those jars.

When those 2 jars are in the same directory as the owner jar, java is able to find them and it works fine. But I don’t want this; I want those jars to actually be INSIDE it. What’s the deal? How can I make an executable jar with other jars inside it work?

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1 Answer

  1. Editorial Team

    You can use something like OneJar or jarjar (or any of several others) to pack up everything inside of a single jar.

    If you’re building with Maven you could use the Maven Shade Plugin.

    You could use a custom classloader like JarClassLoader that will allow precisely what you want.

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