.

You should use the async chat event.

 

@NinjaStix taught me this way, its a little bit hacky, but works:

Code (Text):

e.setMessage("chat format");

        e.setFormat(e.getMessage());

 

Check the console for an exception. If the the message is not broadcasting then something is going wrong inside the method, or before the method is even called. Paste your stack trace, if any.

 

instead of doing

Code (Java):

format = format.replaceFirst("%displayname%","");
formats.add(player.getDisplayName());

try this replacing method

Code (Java):

format = format.replace("%displayname%", player.getDisplayName());

 

I think your getting caught in an infinite loop "while (format.indexOf("%") > -1) {" after you test the plugin let the server run for a couple mins. if the server hangs this is the case. I'm sorry I didn't see your reply popup earlier, I somehow missed it I guess.

EDIT: If this code is in the AsyncPlayerChatEvent then I am thinking it might not hang the server(can't think rn). Try to print a debug message inside the while loop to see if the condition is ever met.

Sorry if nothing I've typed makes any sense, I am really tired.

 

Your method is pretty unefficient and hard to overview. If you want to replace for example the player name, use @MadMaxCookie 's method.

If you learned a similar method like yours from a tutorial, you should search for a new one.

 

expanding idea
if you are watching or reading tutorial you have to learn code before using it.

So that you can create your own method more efficient or edible.