java.util.zip.zipexception : unknown compression method -

I am working with a third party API while using the API, I always get an exception

  java.util.zip.zipexception: unknown compression method  

There is no zip file in it, I tried not to use the .jar file of the API, Instead of using class files directly, but it still gives me the same error.

What could possibly be the reason? How can I get started with my debugging? There is a class worditator which uses java.util.zip.InflaterInputStream but I do not think the problem is with the API.

I'm stuck! What could possibly happen?

I feel like someone is trying to open corrupt Zip-file / stream, Or something that is not a zip file or stream.

Since Jotho is GPL, getting your best shot source code and debugging the thing yourself is done in Eclipse, you can set an exception breakpop on ZipException and the exception The debugger will stop immediately before throwing.