Error about database conenction

Question

hi everyone i ve a problem about connecting to ms sql server. i ve made two tables on MSsql server names are rezervation and sale. those tables ve same column names. column names are name(varchar50) surname(varchar50) airline(varchar50) flight_no(nvarchar50) departure_date(date) departure_city(varchar50) arrival_city(varchar50) departure_time(time(0)) arrival_time(time(0)) gate(int) price(nvarchar).
when i run the program, program starts but when i press the rezervation button i get an error it says SQLException: [Microsoft][ODBC Driver Manager] Invalid string or buffer length. here is my whole code can anyone tell me where did i do wrong i m studyin about 3 days on it n cant get solve the problem. i m doin this simple project for my school term project. just any clue to solve problem thnx
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.sql.*;
public class TableRowColumn extends JFrame // class begin
JTable table;
DefaultTableModel model;
JPanel buttonPanel;
JButton button;
public TableRowColumn() // constructor begin
// create table
Object[][] data = {{"client name","client surname","thy...","ex-1234","year-month-day","city name","city name","hour:min","hour:min","gate no","750 tl"}};
String[] columnNames = {"NAME","SURNAME","AIRLINE","FLIGHT NO","DEPARTURE DATE","DEPARTURE CITY","ARRIVAL CITY","DEPARTURE TIME","ARRIVAL TIME","GATE","PRICE"};
model = new DefaultTableModel(data, columnNames);
table = new JTable(model);
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
// adding button to frame
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
buttonPanel = new JPanel();
getContentPane().add( buttonPanel, BorderLayout.SOUTH );
//giving action to button NEW ENTRY
button = new JButton( "New Entry" );
buttonPanel.add( button );
button.addActionListener( new ActionListener()
public void actionPerformed(ActionEvent e)
model.setRowCount( model.getRowCount() + 1 );
//giving action to DELETE ENTRY button
button = new JButton( "Delete Entry" );
buttonPanel.add( button );
button.addActionListener( new ActionListener()
public void actionPerformed(ActionEvent e)
model.removeRow(model.getRowCount()-1);
// giving action to REZERVATION button
button = new JButton("Rezervation");
buttonPanel.add( button );
button.addActionListener ( new ActionListener()
public void actionPerformed(ActionEvent e)
// java_data is name of the database i ve create on sql server
String url = "jdbc:odbc:java_data";
Connection con = null;
Statement stmt = null;
String query = "SELECT name, surname, airline, flight_no, departure_date, departure_city, arrival_city, departure_time, arrival_time, gate, price from Rezervation";
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
} catch(java.lang.ClassNotFoundException e1)
System.err.print("ClassNotFoundException: ");
//System.err.println(e.getMessage());
try {
con = DriverManager.getConnection(url,
"myLogin", "myPassword");
stmt = con.createStatement();
stmt.executeUpdate("INSERT INTO Rezervation " +"values(" + "name , surname , airline , flight_no , departure_date , departure_city , arrival_city , departure_time , arrival_time , gate , price" );
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
String q = rs.getString("name");
String a = rs.getString("surname");
String z = rs.getString("airline");
String w = rs.getString("flight_no");
String s = rs.getString("departure_date");
String x = rs.getString("departure_city");
String d = rs.getString("arrival_city");
String c = rs.getString("departure_time");
String r = rs.getString("arrival_time");
String f = rs.getString("gate");
String v = rs.getString("price");
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
// giving action to SALE button
button = new JButton("sale");
buttonPanel.add(button);
button.addActionListener ( new ActionListener()
public void actionPerformed (ActionEvent e)
} // constructor end
// to add new row to table
private Object[] createRow()
Object[] newRow = new Object[2];
int row = table.getRowCount() + 1;
newRow[0] = Integer.toString( row );
return newRow;
// main begin
public static void main(String[] args)
TableRowColumn frame = new TableRowColumn();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setTitle("Ticket Rezervation & Sale");
frame.setSize(1280,600);
frame.setVisible(true);
} // main end
} //class end

Answer 1

1. Use code tags when you post code.
2. Do not mix jdbc code with GUI code. Use a class for just the jdbc code and then use that class in your GUI code.
3. Do not use the ODBC to access MS SQL Server. It has a significant problem. Get one of the java drivers.
4. Your SQL is wrong. Learn the basics of SQL before writing java code that relies on it.