public class MySQL_Test {


    public static void main(String[] args) {
       MySQL db = new MySQL();
        try {
            db.MySQLConnection("root","","");
        } catch (Exception ex) {
            Logger.getLogger(MySQL_Test.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

}
public class MySQL {

    private static Connection Conexion;


    public void MySQLConnection(String user, String pass, String db_name) throws Exception {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Conexion = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + db_name, user, pass);
            JOptionPane.showMessageDialog(null, "Se ha iniciado la conexión con el servidor de forma exitosa");
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(MySQL.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(MySQL.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}