using just arraylist by removing hashmap

i am calling following method like below from main method
      checkDatabases(rows);

The implementation code of checkDatabases(rows) is as below



private static void checkDatabases(String[] rows) {
System.out.println("rows.length : "+rows.length);

                  String username="";//this is first cell value of each line of the text
                    String password="";//this is second cell value of each line of the text
            PreparedStatement pstmt = null;      
            List<HashMap<String,String>> missingList = new ArrayList<HashMap<String,String>>();








try{
                        Class.forName("com.mysql.jdbc.Driver").newInstance();
                        Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
                        Statement stmt = con.createStatement();


                        String usernameColumn = genericImporterProp.getString("usernameColumn");
                        String passwordColumn = genericImporterProp.getString("passwordColumn");
                        ResultSet rs1 = stmt.executeQuery("select * from login where "  + usernameColumn + "='"+username+"' and " + passwordColumn + "='"+Double.parseDouble(stringCellValue)+"'");


                        boolean isExist = false;
                        if (rs1!=null) {

                              while (rs1.next()){
                                    isExist=true;
                                    String rec1 = rs1.getString(1);
                                    String rec2 = rs1.getString(2);
                                    System.out.println("rec1 is--"+rec1+"---rec2 is---"+rec2);
                              }
                        }

                        if (!isExist) {
                              HashMap<String,String> mapDetail =new HashMap<String,String>();
                              mapDetail.put("username",username);
                              mapDetail.put("password",password);




                              for(HashMap<String,String> newMapDetail : missingList) {
                                    String myUseridToPass = newMapDetail.get("username");
                                    String myPasswordToPass = newMapDetail.get("password");
                                    System.out.println("myUseridToPass-->"+myUseridToPass);
                                    System.out.println("myPasswordToPass-->"+myPasswordToPass);
                                   
                              }


                              missingList.add(mapDetail);

                        }


                        //pstmt.close();
                        con.close();
                  }
                  catch(Exception e){

                        System.out.println("e-->"+e);
                  }
            }

            System.out.println("Missing List : "+missingList);

            generateCsvFile("c://MissingList.csv", missingList);
            sendErrorEmail("c://MissingList.csv");

      }


 
I would like to enhance my program by just using ArrayList for usernames and passwords to query on databse by getting rid of HashMaps.

I need to cast the objects within the list when I refer to them.



I need to  Create a class to hold your username and password strings, and then objects of that class can live in my missingList (the ArrayList).

How can I achieve it.I cannot use java 1.5 either. Only java 1.4 I have to use.

Any ideas, suggestions, sample code, links, source code highly appreciated. Thanks in advance