> 原文:[https://www . geesforgeks . org/how-fix-Java-lang-class castexception-in-treeset/](https://www.geeksforgeeks.org/how-to-fix-java-lang-classcastexception-in ...

Using generics results in more robust code and avoids ClassCastExceptions in your Java programs. This in-depth tutorial introduces you to generics and their types and methods. Generics are used in ...

I get this ClassCastException with Jetty 9 and Atmosphere when Atmosphere writes to a suspended connection connected with the transport long-polling: 13:07:21.237 WARN [dispatch-def-11] ...