Java function to read from sql database

 public static ResultSet sqlread(String S){
      ResultSet rs = null;
       try
    {
      // create a mysql database connection
      String myUrl = "jdbc:mysql://localhost:3306/firewall?zeroDateTimeBehavior=convertToNull";
      Class.forName("com.mysql.jdbc.Driver");
      Connection conn = DriverManager.getConnection(myUrl, "root", "Cns@54321");
     
      Statement st = conn.createStatement();

      // note that i'm leaving "date_created" out of this insert statement
        rs = st.executeQuery(S);
     
    }
       catch (Exception e)
    {
      System.err.println("Got an exception!");
      System.err.println(e.getMessage());
    }
       return rs;
  }