public class DBSingleton {
    private static final DBSingleton ONLY_ONE = new DBSingleton();
    private Connection connection = null;
    private DBSingleton() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection("jdbc:mysql://rds-mysql-sanria.czqrdgrwq7kk.ap-south-1.rds.amazonaws.com:3306/BIM", "sanriadb","12345678");// SQLException
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }

    public static DBSingleton getInstance() {
        return ONLY_ONE;
    }

    public Connection getcon() {
        return connection;
    }
}

private Connection con = DBSingleton.getInstance().getcon();