PLS help me about file access!!

Question

now the file struct is like the bellow:
<root>/db
db.db
<root>/server
RemoteDataImp.java
how to write the code in RemoteDataImp.java to access file db.db??
the code writen bellow is wrong!
dataWrapper = new Data("../db/db.db");

Answer 1

first if this is a file for your database then you need to connected to
the machine and then you make the code that can access this file
if you use windows then all you have to do is go to control panel
and then open Data Sources (ODBC)in User DSN click on Add button
there choose the database driver if you use Access then double click on
that then anther box will popup there in Data Source Name write the name
of the file or any name let say in your case the name is db.db
then down there you will see a button calls Select click on that
button to select the file you have saved you database in
I will give you an idea about how to call you database files if you use Access
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class RemoteDataImp {
  private static final String DEFAULT_DRIVER = "sun.jdbc.odbc.JdbcOdbcDriver";
  private static final String DEFUALT_CONNECTION_INFO = "jdbc:odbc:db.db";
  private PreparedStatement setUserNames,removeUserNames;
  private static Connection connection;
  public RemoteDataImp(String driver,String info)throws Exception{
    if (driver == null) driver = DEFAULT_DRIVER;
    if (info == null) info = DEFUALT_CONNECTION_INFO;
    Class.forName(driver).newInstance();
    connection = DriverManager.getConnection(info);
    connection.setAutoCommit(true);
  public PreparedStatement prepareConnection(String sql) throws Exception{
    return connection.prepareStatement(sql);
  public RemoteDataImp()throws Exception {
    this(DEFAULT_DRIVER,DEFUALT_CONNECTION_INFO);
  public void saveToDB(/*the user calss which is containing the set and get */ user) throws Exception{
    RemoteDataImp r = new RemoteDataImp();
    if (setUserNames == null) {
       setUserNames = r.prepareConnection("INSERT INTO userTable (USER_ID,NAME,E_MAIL) VALUES(?,?,?)");
     setUserNames.setString(1,user.getUserId());
     setUserNames.setString(2,user.getName());
     setUserNames.setString(3,user.getEmail());
      setUserNames.execute();
  ublic void removeFromDB(/*the user calss which is containing the set and get */ user) throws Exception {
    DatabaseConnection d = new DatabaseConnection()
    if (removeUserNames == null) {
   removeUserNames = d.prepareConnection("DELETE FROM userTable WHERE USER_ID =?");
removeUserNames.setString(1,user.getUserId());
    removeUserNames.execute();
  public void finalize() throws Throwable {
    try {
      connection.close();
    catch (Exception ex) {
}