import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;

 public class Login{
   String Username = "awaw";
   String Password = "okk";
   String msg = " ";
   private JTextField txtUsername;
   private JPasswordField txtPassword;
   public static void main(String[] args){
     Login gui = new Login();
     gui.go();
   }
   public void go(){
     JFrame frame = new JFrame();
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     JPanel panel = new JPanel();
     JLabel lblUsername = new JLabel("Username:");
     JLabel lblPassword = new JLabel("Password:");
     txtUsername = new JTextField(20);
     txtPassword = new JPasswordField(20);
     JButton btnLogin = new JButton("Login");
     btnLogin.addActionListener(new LoginListener());
     JButton btnCancel = new JButton("Cancel");
     btnCancel.addActionListener(new CancelListener());
     panel.add(lblUsername);
     panel.add(txtUsername);
     panel.add(lblPassword);
     panel.add(txtPassword);
     panel.add(btnLogin);
     panel.add(btnCancel);
     frame.getContentPane().add(BorderLayout.CENTER,panel);
     frame.setSize(300,300);
     frame.setVisible(true);
   }
   public class LoginListener implements ActionListener{
     public void actionPerformed(ActionEvent event){
       if(Username.equals(txtUsername.getText())){
         if(Password.equals(txtPassword.getText())){
           msg = "Login success!";
         }else{
           msg = "Login failed!";
         }
       }else{
         msg = "The username or password incorrect. Please try again!";
       }
       JOptionPane.showMessageDialog(null,msg);
     }
   }
   public class CancelListener implements ActionListener{
     public void actionPerformed(ActionEvent event){
       txtUsername.setText("");
       txtPassword.setText("");
       txtUsername.requestFocus();
     }
   }
 }