I coded a small application in Netbeans, and used the AbsoluteLayout it provides for designing the GUI. Everything compiles and runs fine within Netbeans, but after I JAR the project and try to execute it a NoClassDefFoundError is thrown. The exact error looks like this:

java.lang.NoClassDefFoundError: org/netbeans/lib/awtextra/AbsoluteLayout

I don't have much experience with JARing, and this is the first application I've wrote with Netbeans, so I'm a bit lost as to why this is occuring. The manifest is written correctly, and I can see the the program begins execution, but this error is thrown when exected as a JAR.

Any idea how this problem can be fixed? Is there a way to include the missing class definitions with the JAR?


  • Make sure the contents are in the .jar with jar tvf x.jar. Then you need to put the jar in your -classpath.


    java -classpath x.jar; com.ronsoft.books.nio.buffers.BufferDupe

    x.jar contains the directory structure of the package information, so I still need to call the program, BufferDupe, with the directories.

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