Untitled


    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
import java.io.*;
import java.util.Scanner;
import java.util.StringTokenizer;


    public class loginsource extends JFrame
    {
    // Variables declaration
    private JLabel jLabel1;
    private JLabel jLabel2;
    private JTextField jTextField1;
    private JPasswordField jPasswordField1;
    private JButton jButton1;
    private JPanel contentPane;
    // End of variables declaration


    public loginsource()
    {
    super();
    create();
    this.setVisible(true);
    }


    private void create()
    {
    jLabel1 = new JLabel();
    jLabel2 = new JLabel();
    jTextField1 = new JTextField();
    jPasswordField1 = new JPasswordField();
    jButton1 = new JButton();
    contentPane = (JPanel)this.getContentPane();

    //
    // jLabel1
    //
    jLabel1.setHorizontalAlignment(SwingConstants.LEFT);
    jLabel1.setText("Username:");
    //
    // jLabel2
    //
    jLabel2.setHorizontalAlignment(SwingConstants.LEFT);
    jLabel2.setText("Password:");
    //
    // jTextField1
    //

    jTextField1.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e)
    {
    jTextField1_actionPerformed(e);
    }

    });
    //
    // jPasswordField1
    //
    jPasswordField1.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e)
    {
    jPasswordField1_actionPerformed(e);
    }

    });
    //
    // jButton1
    //
    jButton1.setBackground(new Color(204, 204, 204));
    jButton1.setText("Login");
    jButton1.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e)
    {
    jButton1_actionPerformed(e);
    }
    });
    //
    // contentPane
    //
    contentPane.setLayout(null);
    contentPane.setBorder(BorderFactory.createEtchedBorder());
    contentPane.setBackground(new Color(204, 204, 204));
    addComponent(contentPane, jLabel1, 5,10,106,18);
    addComponent(contentPane, jLabel2, 5,47,97,18);
    addComponent(contentPane, jTextField1, 110,10,183,22);
    addComponent(contentPane, jPasswordField1, 110,45,183,22);
    addComponent(contentPane, jButton1, 135,75,83,28);
    //
    // login
    //
    this.setTitle("fail0verflow Login Window");
    this.setLocation(new Point(76, 182));
    this.setSize(new Dimension(335, 141));
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    this.setResizable(false);
    }

    /** Add Component Without a Layout Manager (Absolute Positioning) */
    private void addComponent(Container container,Component c,int x,int y,int width,int height)
    {
    c.setBounds(x,y,width,height);
    container.add(c);
    }


    private void jTextField1_actionPerformed(ActionEvent e)
    {


    }

    private void jPasswordField1_actionPerformed(ActionEvent e)
    {

    }

    private void jButton2_actionPerformed(ActionEvent e)
    {

    }

    private void jButton1_actionPerformed(ActionEvent e)
    {
    String username = new String(jTextField1.getText());
    String password = new String(jPasswordField1.getPassword());

    if(username.equals("") || password.equals("")) // If password and username is empty > Do this >>>
    {
    jButton1.setEnabled(false);
    JOptionPane.showMessageDialog(null,"You must enter a username and password to login.");
    jTextField1.setText("");
    jPasswordField1.setText("");
    jButton1.setEnabled(true);
    this.setVisible(true);
    }
    else
    {
    int confirm =JOptionPane.showConfirmDialog(null,"<HTML>You entered<FONT COLOR = RED> <B>"+username+
    		"</B></FONT> as your username.<BR> Do you want to continue?</HTML>");
    switch(confirm){ // Switch > Case
    case JOptionPane.YES_OPTION: // Attempt to Login user
    jButton1.setEnabled(false); // Set button enable to false to prevent 2 login attempts
    File file = new File("C:/text.txt");
    try{
    	boolean u = false;
    	boolean p = false;
        char[] pass = jPasswordField1.getPassword();
        String f = "";
        String c = new String(pass);
        Scanner s = new Scanner(file);
        while(s.hasNextLine()) {
          String[] a = s.nextLine().split(",");
          int x = 0;
          for(; x < a.length; x+=2)
          {
            if(username.equals(a[x]))
            {
              u = true;
              f = a[x];
              break;
            }
            else{continue;}
          }
          for(; x < a.length; x+=1)
          {
            if(c.equals(a[x]))
            {
              p = true;
            }
          }
        }
        if(u == true && p == true) {
          JOptionPane.showMessageDialog(null, "Login success.\nWelcome " + f +"!");
          jButton1.setEnabled(true);
        } else {
          JOptionPane.showMessageDialog(null, "Invalid Account!");
          jButton1.setEnabled(true);
        }
    }
        catch (Exception db)
         {
        	 JOptionPane.showMessageDialog(null, "Error reading database.\nProgram will now exit.", "Error", JOptionPane.ERROR_MESSAGE);
        	 System.exit(0);
         }
    this.setVisible(true);
    break;

    case JOptionPane.NO_OPTION: // No Case.(Go back. Set text to 0)
    jButton1.setEnabled(false);
    jTextField1.setText("");
    jPasswordField1.setText("");
    jButton1.setEnabled(true);
    break;

    case JOptionPane.CANCEL_OPTION: // Cancel Case.(Go back. Set text to 0)
    jButton1.setEnabled(false);
    jTextField1.setText("");
    jPasswordField1.setText("");
    jButton1.setEnabled(true);
    break;

    } // End Switch > Case


    }
    }
    public static void main(String[] args)
    {
    JFrame.setDefaultLookAndFeelDecorated(true);
    JDialog.setDefaultLookAndFeelDecorated(true);
    try
    {
    UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    }
    catch (Exception ex)
    {
    System.out.println("Failed loading L&F: ");
    System.out.println(ex);
    }
    new loginsource();
    };


    }