public class CommandBuild
  implements CommandExecutor
{
  public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args)
  {
    if ((sender instanceof Player))
    {
      Player p = (Player)sender;
      if (p.hasPermission("build.use"))
      {
        if (data.canbuild.contains(p))
        {
          p.sendMessage(data.prefix + "Kannst nd bauen..");
          data.canbuild.remove(p);
        }
        else
        {
          p.sendMessage(data.prefix + "Du kannst bauen!");
          data.canbuild.add(p);
        }
      }
      else {
        p.sendMessage(data.noperm);
      }
    }
    else
    {
      data.console();
    }
    return false;
  }
}