How to use

setAliases

method

in

org.bukkit.command.PluginCommand

  List<String> aliases = new ArrayList<>();
  if (value instanceof List<?>)
    command.setAliases(
        ((List<?>) aliases).stream().map(object -> object.toString()).collect(Collectors.toList()));
  else
    command.setAliases(Arrays.asList(value.toString()));
  break;
case "permission":

public static void registerCommand(String... aliases) {
  if (aliases != null) {
    PluginCommand command = getCommand(aliases[0], SimpleClans.getInstance());
    if (command != null) {
      command.setAliases(Arrays.asList(aliases));
      getCommandMap().register(SimpleClans.getInstance().getDescription().getName(), command);
    }
  }
}

private static void registerXprateCommand() {
  List<String> aliasList = new ArrayList<String>();
  aliasList.add("mcxprate");
  PluginCommand command = mcMMO.p.getCommand("xprate");
  command.setDescription(LocaleLoader.getString("Commands.Description.xprate"));
  command.setPermission("mcmmo.commands.xprate;mcmmo.commands.xprate.reset;mcmmo.commands.xprate.set");
  command.setPermissionMessage(permissionsMessage);
  command.setUsage(LocaleLoader.getString("Commands.Usage.2", "xprate", "<" + LocaleLoader.getString("Commands.Usage.Rate") + ">", "<true|false>"));
  command.setUsage(command.getUsage() + "\n" + LocaleLoader.getString("Commands.Usage.1", "xprate", "reset"));
  command.setAliases(aliasList);
  command.setExecutor(new XprateCommand());
}

pluginCommand.setAliases(Arrays.asList(params.aliases().split(",")));