Help me out with this program

Question

hi,
I am trying to make a login program that connects to an access database with table 'PASSWORD' containing the username and the password.
I have written the program but i could not continue as i am in fix with few errors which it is giving can anyone help me in doing the coding of this program..
//***************** Create a DSN named "Login" from the Control Panel ODBC ********//
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.plaf.metal.*;
import java.sql.*;
public class Screen extends JFrame implements ActionListener
JTextField txtuser;
     JPasswordField txtpass;
public Screen()
JPanel contentpane=(JPanel)getContentPane();
contentpane.setLayout(new FlowLayout());
JLabel username= new JLabel("UserName:");
JTextField txtuser= new JTextField(18);
JPassword Field JLabel password= new JLabel("Password:");
          txtpass = new JPasswordField(18);
          txtpass.setEchoChar('*');
JButton login= new JButton("Login");
          login.addActionListener(this);
          login.setActionCommand("Login");
     JButton cancel= new JButton("Cancel");
          cancel.addActionListener(this);
          cancel.setActionCommand("Cancel");
contentpane.add(username);
contentpane.add(txtuser);
contentpane.add(password);
contentpane.add(txtpass);
contentpane.add(login);
contentpane.add(cancel);
addWindowListener(new Screen.WindowEventHandler());
static public void main(String[] args)
Screen scr= new Screen();
scr.setSize(new Dimension(300,140));
scr.setTitle("Login Screen");
scr.setVisible(true);
public void actionPerformed(ActionEvent e)
     Connection con = null;
     String query;
     String id=null,pwd=null;
     ResultSet rs;
     Statement stmt;
/* U Need to Get the Text Box values of ID and Password into "id" and "pwd" variables,
I tried to Do this as follows , but no success ..I havent worked on SWING class before.
so u check out the method required to get the TEXT box values into these variables...*/
id=txtuser.getText();
pwd=txtpass.getText();
     query = "Select Password from user where ID='"+id+"'";
if (e.getActionCommand()=="Login")
try
          Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
catch( ClassNotFoundException ee)
          ee.printStackTrace();
// Here i m using a DSN "Doctor" if u create other than this name then Specify the name of the DSN here in place of "Login"
     String dsn = "jdbc:odbc:doctor";
try
               con = DriverManager.getConnection(dsn);
     catch(Exception ex)
          System.out.println("Exception in Connection " + ex);
try
     stmt = con.createStatement();
     rs=stmt.executeQuery(query);
if(pwd==rs.getString(1))
               System.out.println("This user is valid");
                    //** VALID USER , DO AS PER UR REQUIREMENT
          else
               System.out.println("This user is invalid");
               //INVALID USER , DO AS PER UR REQUIREMENT
rs.close();
     stmt.close();
catch(Exception ee)
          ee.printStackTrace();
if (e.getActionCommand()=="Cancel")
System.out.println("Cancel is pressed");
public class WindowEventHandler extends WindowAdapter
public void windowClosing(WindowEvent e)
System.exit(0);
Can Anybody Code this for me..
Thanks in Advance........

Answer 1

hi,
i watched your program and i have changed the code as follow as this:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.plaf.metal.*;
import java.sql.*;
public class Screen extends JFrame implements ActionListener
JTextField txtuser;
JPasswordField txtpass;
public Screen()
JPanel contentpane=(JPanel)getContentPane();
contentpane.setLayout(new FlowLayout());
JLabel username= new JLabel("UserName:");
txtuser= new JTextField(18);
JLabel password= new JLabel("Password:");
txtpass = new JPasswordField(18);
txtpass.setEchoChar('*');
JButton login= new JButton("Login");
login.addActionListener(this);
login.setActionCommand("Login");
JButton cancel= new JButton("Cancel");
cancel.addActionListener(this);
cancel.setActionCommand("Cancel");
contentpane.add(username);
contentpane.add(txtuser);
contentpane.add(password);
contentpane.add(txtpass);
contentpane.add(login);
contentpane.add(cancel);
addWindowListener(new Screen.WindowEventHandler());
static public void main(String[] args)
Screen scr= new Screen();
scr.setSize(new Dimension(300,140));
scr.setTitle("Login Screen");
scr.setVisible(true);
public void actionPerformed(ActionEvent e)
Connection con = null;
String query;
String id=null;
String pwd=null;
ResultSet rs;
Statement stmt;
String dsn = null;
String driver_connection = null;
driver_connection = "sun.jdbc.odbc.JdbcOdbcDriver";
dsn = "jdbc:odbc:Prove";
query = "SELECT * FROM user";
try
id = txtuser.getText();
pwd = txtpass.getText();
if (e.getActionCommand().equals("Login"))
Class.forName(driver_connection);
con = DriverManager.getConnection(dsn);
stmt = con.createStatement();
rs = stmt.executeQuery(query);
while(rs.next())
if(id.equals(rs.getString("ID")) && pwd.equals(rs.getString("PASSWORD")))
System.out.println("The user is valid");
return;
else
System.out.println("The user is invalid");
System.exit(0);
rs.close();
stmt.close();
else if(e.getActionCommand()=="Cancel")
System.out.println("Cancel is pressed");
WindowEventHandler w = new WindowEventHandler();
w.windowClosing();
catch(Exception exception)
System.out.println("Error: "+exception.getMessage());
public class WindowEventHandler extends WindowAdapter
public void windowClosing()
System.exit(0);
try it,
i hope this could help you!!!!