Is there a way for me to place jars inside of an executable jar and get it to run? When I put them inside of my executable jar, the files cannot be found, and I get the infamous "java.lang.NoClassDefFoundError" error. How can I get the classpath to look into the executable jar? I tried editing the manifest: Class-Path: firstFile.jar secondFile.jar But this only works if the jar files are in the same directory as the executable jar. My jar files are inside of the executable jar.