Java Web Start NumberFormatException while running Jar application

Question

While trying to run Jar application using JWS (JNLP) launch. It has been giving me this error. Can\'t even find where is the mistake. Any directions would help.

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Answer 1

Posting this here in case someone has that very same error, even with java 8 Update 101:

In our specific case, after a few hours of digging, the problem ended up being that NetBeans version 7.4 was putting some useless junk on the Codebase property of the jar's MANIFEST.MF; by going into the project properties, Application -> Web Start and then changing Codebase to User defined and Codebase Preview to *, the application started working correctly.

Please do keep in mind that we're using an applet instead of a JNLP application, so your mileage may vary.