java

    private Connection connection;
    private String url_base = "jdbc:mysql://", host, db, username, password;
    private Integer port;
    private boolean debug;

    public MySQL(String host, Integer port, String db, String username, String password, boolean debug) {
        this.host = host;
        this.port = port;
        this.db = db;
        this.username = username;
        this.password = password;
        this.debug = debug;
    }

    public Connection getConnection() {
        return connection;
    }

    public boolean isConnected() {
        try {
            if ((connection == null) || (connection.isClosed())) return false;
            else return true;
        } catch (SQLException e) {
            if(debug == true)
            e.printStackTrace();
        }
        return false;
    }

    public void connect() {
        if (!isConnected()) {
            try {
                Class.forName("com.mysql.jdbc.Driver");
                connection = DriverManager.getConnection(url_base + host + ":" + port + "/" + db, username, password);
                if (debug == true) System.out.printf("\n[DB] Connection etablished --> " + url_base + host + ":" + port + "/" + db, username, password);
            } catch (ClassNotFoundException e) {
                if (debug == true) e.printStackTrace();
            } catch (SQLException e) {
                if (debug == true) {
                    System.err.printf("\n[DB] Failled to connect --> " + url_base + host + ":" + port + "/" + db, username, password);
                    e.printStackTrace();
                }
            }
        }
    }

    public void disconnect() {
        if (isConnected()) {
            try {
                connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }