public static Rank getRank(UUID uuid) { CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> { try { final PreparedStatement statement = plugin.getConnection(). prepareStatement("SELECT RANK FROM " + plugin.table + " WHERE UUID=?"); statement.setString(1, String.valueOf(uuid)); final ResultSet set = statement.executeQuery(); return Rank.valueOf(set.getString("RANK").toUpperCase()); } catch (SQLException e) { e.printStackTrace(); } return null; }); return null; }