public static boolean existsT_USER_DU3() {
        java.sql.Statement stmt = null;
        try {
            synchronized (DBconn.class) {
                stmt = (Statement) connection.createStatement();
            }
            int count = 0;
            String sql = "SELECT COUNT(*) FROM information_schema.tables WHERE " 
                + "table_schema = '" + DBconn.DATABASE + "'" + 
                " AND table_name = 'T_USER_DU3'";
            ResultSet rs = stmt.executeQuery(sql);
            while (rs.next()) {
                count = rs.getInt(1);
            }
            
            if (count == 1){
                return true;
            } else {
                return false;
            }

        } catch (SQLException ex) {
            ex.printStackTrace();
            return false;
        } finally {
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (SQLException ex) {
                    ex.printStackTrace();
                }
            }
        }
    }