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

 public class Login{
     JTextField txtUsername = null;
     JTextField txtPassword = null;
     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();
         txtUsername = new JTextField(20);
         txtPassword = new JPasswordField(20);

         JLabel lblUsername = new JLabel("Username:");
         JLabel lblPassword = new JLabel("Password:");

         JButton btnLogin = new JButton("Login");
         btnLogin.addActionListener(new LoginListener(this));
         JButton btnCancel = new JButton("Cancel");
         btnCancel.addActionListener(new CancelListener(this));

         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 void sendMessage(String msg) {
         JOptionPane.showMessageDialog(null,msg);
     }

     public String getUsername() {
         return txtUsername.getText();
     }

     public String getPassword() {
         return txtPassword.getText();
     }

     public void clear() {
         txtUsername.setText("");
         txtPassword.setText("");
         txtUsername.requestFocus();
     }

     public class LoginListener implements ActionListener{
         String username = "reyhanzo";
         String password = "rey123";
         Login login;

         public LoginListener(Login login) {
             this.login = login;
         }

         public void actionPerformed(ActionEvent event){
             if(username.equals(login.getUsername()) && password.equals(login.getPassword())){
                 login.sendMessage("Welcome "+login.getUsername());
             }else{
                 login.sendMessage("Login Failed");
             }
         }
     }
     public class CancelListener implements ActionListener{
         Login login;

         public CancelListener(Login login) {
             this.login = login;
         }

         public void actionPerformed(ActionEvent event){
             login.clear();
         }
     }
 }