try 
    {
      
       Class .forName("sun.jdbc.odbc.JdbcOdbcDriver");
    }
     catch (ClassNotFoundException e)
    {
      JOptionPane.showMessageDialog(parent,"Error: "+e.getMessage());
    }
     try  {
      Connection con = DriverManager.getConnection("jdbc:odbc:Bank", "", "");
      System.getProperty("jdbc.drivers");

      String sqlstring="INSERT temp.dbf (num,fam,name,pat,summa) VALUES (?,?,?,?,?)";
      PreparedStatement pstmt = con.prepareStatement(sqlstring);

       int  updtt= 0 ;

     for ( int  i= 0 ;i<accountList.getAccountVector().size();i++)
   {
     pstmt.setString( 1 ,((Vector)accountList.getAccountVector().elementAt(i)).elementAt( 0 ).toString());
...
pstmt.setDouble( 5 , new   Double (((Vector)accountList.getAccountVector().elementAt(i)).elementAt( 4 ).toString()).doubleValue());
     updtt=updtt+pstmt.executeUpdate(sqlstring);
   }

pstmt.executeUpdate(sqlstring);

     for ( int  i= 0 ;i<accountList.getAccountVector().size();i++)
   {
     pstmt.setString( 1 ,((Vector)accountList.getAccountVector().elementAt(i)).elementAt( 0 ).toString());
...
pstmt.setDouble( 5 , new   Double (((Vector)accountList.getAccountVector().elementAt(i)).elementAt( 4 ).toString()).doubleValue());
updtt=updtt+pstmt.executeUpdate();
   }