private static final String p = "123456"; // hard-coded credential

public static void main(String[] args) throws SQLException {
    String url = "jdbc:mysql://localhost/test";
    String u = "admin"; // hard-coded credential

    getConn(url, u, p);
}

public static void getConn(String url, String v, String q) throws SQLException {
    DriverManager.getConnection(url, v, q); // sensitive call
}