Read file, search file for duplicate addresses

Question

Hi - i have no teacher to ask, nor do i know any java programmers to ask this question, so your guidance would be appreciated.
I have created an "Insurance Project " for myself� but I do not know how to proceed,I have a file that contains 30,000 records in the format:
Policy1 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
Policy2 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
Policy3 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
Policy4 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
Policy5 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
Policy6 ccyy mm dd NameOfInsured StreetOfInsured CityOfInsured
In a nutshell: I want to check to see if any one household holds more than 1 policy. If a household does have more than 1 policy then I want to be able to offer those households "package deals".
My problem: how do I read in the file for comparasons? And how do i handle the comparasons?
Do I create a duplicate file and compare record 1 in fileA to each record in fileB, and if so, after the first search of fileB it will reach EOF, how do I get the pc to compare fileA record2 with the start of fileB?
Or Do I move record1 into a holding-area & compare each record against record1, problem again, eventually I will reach EOF, how do I let pc know: get record2 go to first record in file & compare each file?
Open file insured.dat
Read in file insured.dat
thisPolicy = policyNumber //move policy number(address)you are searching for
getNextPolicy
//compare thisPolicy to nextRecord in file
if nextRecord = NUL //then go to the top of the file,
//again to search with next record
else
if thisPolicy-Address is the same as nextRecord-Address
move nextRecord to pkgDealFile.dat
getNextPolicy
Kinda stumped,
Thank you

Answer 1

Make very simple Access.DB
Go to your control panel and look for 'ODBC data souces' go to System DSN and add the name of your database. (Go to the help files)
You can test your connection with this programme. Drag and drop it to notepad and run it from the command line./*
Dear Friends,  This program will detect whether jdbc driver is properly installed in ur system or not.
This will helps you in ur jdbc applications.
If anyone having any pblms, please feel free to contact me at [email protected]
I will be delighted to help you.
Thank you very much.
import java.sql.*;
import java.util.*;
public class MyConnection
     Connection con;
     MyConnection()
          try
// ******************************Connected To Jdbc-Odbc Type - 1 Driver
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con = DriverManager.getConnection("Jdbc:Odbc:dsnname","userid","password");
               con = DriverManager.getConnection("jdbc:odbc:Driver={SQL Server};Server=servername;Database=pubs","userid","password");
// ******************************Connected To Ms-Access JDBC ODBC Driver .
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con = DriverManager.getConnection("Jdbc:Odbc:dsnname","","");
               con = DriverManager.getConnection("jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=G:/admin.mdb","","");
// ******************************Connected To Ms-Access Type-3 Driver.
               Class.forName ("acs.jdbc.Driver");
               String url = "jdbc:atinav:servername:5000:C:\\admin.mdb";
               String username="Admin";
               String password="";
               Connection con = DriverManager.getConnection(url,username,password);
// ******************************Connected To Microsoft SQL.
               Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
               con = DriverManager.getConnection("jdbc:microsoft:sqlserver://servername:1433","userid","password");
// ******************************Connected To Merant.
               Class.forName("com.merant.datadirect.jdbc.sqlserver.SQLServerDriver");
               con = DriverManager.getConnection("jdbc:merant:sqlserver://servername:1433;User=userid;Password=password");
// ******************************Connected To Atinav SqlServer.
               Class.forName ("net.avenir.jdbc2.Driver");
               con= DriverManager.getConnection("jdbc: AvenirDriver://servername:1433/pubs","userid","password");
// ******************************Connected To J-Turbo.
               String server="servername";
               String database="pubs";
               String user="userid";
               String password="password";
               Class.forName("com.ashna.jturbo.driver.Driver");
               con= DriverManager.getConnection("jdbc:JTurbo://"+server+"/"+database,user,password);
// ******************************Connected To jk Jdbc Driver.
               String url= "jdbc:jk:server@pubs:1433";
               Properties prop = new Properties();
               prop.put("user","userid");//Set the user name
               prop.put("password","password");//Set the password
               Class.forName ("com.jk.jdbc.Driver").newInstance();
               con = DriverManager.getConnection (url, prop);*/
// ******************************Connected To jNetDirect Type - 4 Driver
               String sConnect = "jdbc:JSQLConnect://127.0.0.1/database=pubs&user=userid&password=password";
               Class.forName ("com.jnetdirect.jsql.JSQLDriver").newInstance();     
               Connection con= DriverManager.getConnection(sConnect);
// ******************************Connected To AvenirDriver Type - 4 Driver
               String url= "jdbc: AvenirDriver: //servername:1433/pubs";
               java.util.Properties prop = new java.util.Properties ();
               prop.put("user","userid");
               prop.put("password","password");
               Class.forName ("net.avenir.jdbc2.Driver");     
               System.out.println(" Connected To AvenirDriver Type - 4 Driver");
               con= DriverManager.getConnection("jdbc: AvenirDriver://servername:1433/pubs","userid","password");
// ******************************Connected To iNet Sprinta2000 Type - 4 Driver
               String url="jdbc:inetdae7:servername:1433";
               String login="userid";
               String password="password";
               Class.forName("com.inet.tds.TdsDriver");
               System.out.println(" Connected To iNet Sprinta2000 Type - 4 Driver");
               con=DriverManager.getConnection(url,login,password);
// ******************************Connected To iNet Opta2000 Type - 4 Driver
               String url="jdbc:inetdae7:servername:1433";
               String login="sagar";
               String password="sagar";
               Class.forName("com.inet.tds.TdsDriver").newInstance();
               System.out.println(" Connected To iNet Opta2000 Type - 4 Driver");
               con=DriverManager.getConnection(url,login,password);
               DatabaseMetaData md = con.getMetaData();
               System.out.println("Driver Name            " + md.getDriverName());
               System.out.println("Driver Version         " + md.getDriverVersion());
               System.out.println("Database URL is        " + md.getURL());
               System.out.println("Database UserName is   " + md.getUserName());
               System.out.println("Connection Name        " + md.getConnection());
               System.out.println("Database Name          " + md.getDatabaseProductName());
               System.out.println("Database Version       " + md.getDatabaseProductVersion());
               System.out.println("Database ReadOnly Type " + md.isReadOnly());
               System.out.println("MaxColumnNameLength    " + md.getMaxColumnNameLength());
               System.out.println("MaxConnections         " + md.getMaxConnections());
               System.out.println("");
          catch(ClassNotFoundException cnfe)
               System.out.println(cnfe.getException());
               System.out.println("The Specified Driver Does not Exist....");
          catch(SQLException sqle)
               if(sqle.getErrorCode() == 0)
                    System.out.println("No Suitable Driver Found..");
               else if(sqle.getErrorCode() == 1017)
                    System.out.println("Wrong UserName Or Password..");
               else if(sqle.getErrorCode() == 1034)
                    System.out.println("Database not Started..");
                    System.out.println(sqle.getErrorCode());
                    System.out.println(sqle.getSQLState());
                    System.out.println(sqle);
     public static void main (String args[])
          new MyConnection();
}It will tell you if you have done it (JDBC.ODBC) correctly or not. If - well when you have, you can then use java to run queries and write data etc.
You'll also need a PWS to test it, but you can do your writing and queries from the MSDOS shell for now. (then use servlets.)
Good luck!