How to pass data to the write method of the ChannelOutboundHandlerAdapter class?

Question

Java

I have an AdapterOut class that inherits ChannelOutboundHandlerAdapter. I want to pass data to the override write method, but it doesn't work for me. I need to pass data from a TextField to the AdapterOut class so that it sends it to the server. If you have any thoughts, please share, because I'm already tired of searching.