Inserting a record into an Excel

Question

Hello! Everyone, I am now trying to use Excel as a database, however, I could not insert any records into a spreadsheet but I could read the data from it. Please help...here is the code..
import java.io.*;
import java.net.*;
import java.sql.*;
import java.util.*;
public class InteractWithExcel {
     static final String DRIVER_NAME = "sun.jdbc.odbc.JdbcOdbcDriver";
     static final String DATABASE_URL = "jdbc:odbc:EXCELJDBCTest; READONLY=0";
     public static void main(String[] args) {
          try {
               Class.forName(DRIVER_NAME);
               Connection conn = null;
               conn = DriverManager.getConnection(DATABASE_URL);
               Statement stmt = conn.createStatement();
               stmt.executeUpdate("insert into [Sheet1$] values ('ABC', 68)");
               ResultSet rs = /*stmt.executeQuery("select sum(Population) from [Sheet1$]");
                    stmt.executeQuery("select State,Population from [Sheet1$]");
               while (rs.next()) {
                    String state = rs.getString(1);
                    int population = rs.getInt(2);
                    System.out.println(state + " - " + population);
               rs.close();
               stmt.close();
          } catch (ClassNotFoundException cnfe) {
               System.err.println("ClassNotFoundException Was Thrown");
               cnfe.printStackTrace();
          } catch (SQLException sqle) {
               System.err.println("SQLException Was Thrown");
               sqle.printStackTrace();
}

Answer 1

The code is somehow workable....
The problem is that...
1) a record could only be added only if I open the corresponding excel file
2) the record is added to the end of the spreadsheet...
e.g. there three records in the spreadsheet, namely 1, 2, 3,
if I open the file and then run the java programme, the new record will be added to 4...
then I deleted record 4 manually by opening the excel file and then delete,
now, if I run the java programme again, the new record will be added to 5....but not the empty space 4...
how come???
Please help!