Disabling Command And Args

So I want to disable /say and /broadcast. Here is my code:

Code:

@EventHandler
public void event3PreCommand(PlayerCommandPreprocessEvent event)
{
String message = event.getMessage();
Player player = event.getPlayer();
List<String> overridenCommands = new ArrayList<String>();
overridenCommands.add("/bc");
overridenCommands.add("/broadcast");
overridenCommands.add("/say");
if (overridenCommands.contains(message))
{
event.setCancelled(true);
player.sendMessage(ChatColor.WHITE+"Say And Broadcast Have Been Disabled!" );
return;
}
 
}

The problem is people can easily get around it with /broadcast <stuff here>. only /broadcast is disabled.

 

Code:

  @EventHandler
    public void onCommand(PlayerCommandPreprocessEvent event){
        Player p = event.getPlayer();
        String s = event.getMessage();
        String[] args = s.split(" ");
        String cmdAlias = args[0].replaceAll("/", "");
        if (cmdAlias.equalsIgnoreCase("bc")){ event.setCancelled(true);
//rest of code following if format

 

The Way I do It is,

Code:

  public boolean PlayerCommandPreprocessEvent(CommandSender sender, Command cmd, String label, String[] args){
       
        if(cmd.getName().contains("ban")){ //Notice How i did contains and also notice how it returns false.
            return false;
        }
        return false;
       
    }

Also Recall that I did Contains and how it returns false. So if the contain has /ban anywhere in it it will return false.