In JDK there are many places where Chain of Responsibility design

pattern is used. Some of these are as follows:

1. java.util.logging.Logger.log(): In this case Logger class

provides multiple variations of log() method that can take

the responsibility of logging from client in different

scenarios. The client has to just call the appropriate log()

method and Logger will take care of these commands.

2. javax.servlet.Filter.doFilter(): In the Filter class, the

Container calls the doFilter method when a

request/response pair is passed through the chain. With

filter the request reaches to the appropriate resource at the

end of the chain. We can pass FilterChain in doFilter()

method to allow the Filter to pass on the request and

response to the next level in the chain.

https://www.digitalocean.com/community/tutorials/chain-of-responsibility-design-pattern-in-java