class Connection_maker
{
  private Connection conn;
  private static final String DESTINATION = "jdbc:mysql://localhost/";
  public Connection_maker()
  {
     try
     {
        Class.forName("com.mysql.jdbc.Driver");
        this. conn = java.sql.DriverManager.getConnection(DESTINATION, "root", "");
        System.out.println("connected");
     }
     catch (Exception e)
     {
        e.printStackTrace();
     }
   }
   public static void main(String[] args)
   {
       new Connection_maker();
   }
}

bool isAlive(){
   try{
      String query = "SELECT 1";
      Statement st = this.conn.createStatement(ue);
      ResultSet rs = st.executeQuery(query);
      return true;
   }catch(SQLException e){
      // honestly kind of non-specific ??
      return false;
   }
}