Class Login

login.java

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.TextEvent;
import java.awt.event.TextListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

class Login extends JFrame implements ActionListener, TextListener
{

JLabel L1,L2;
JTextField T1,T2;
JButton B1,B2;
public int i=0;
    
    
    
    
        public static void main (String[] args) {   
        {
                JFrame Janela=new Login() {};

                Janela.show();
                //para fechar a janela
                WindowListener x = new WindowAdapter()
                 {
                 public void windowClosing(WindowEvent e)
                  {
                   System.exit(0);
                  }
                 };
                Janela.addWindowListener(x);
               }   


        }
        Login()   
            {
                setTitle("Login");
                setSize(200,150);
                setLocation(550,150);
                getContentPane().setBackground(Color.white);
                getContentPane().setLayout(new GridLayout(3,3,5,2));
                L1 = new JLabel("Usuário");
                L1.setForeground(Color.black);
                L2 = new JLabel("Senha");
                L2.setForeground(Color.black);
                B1 = new JButton ("Logar");     B1.addActionListener(this);
                B2 = new JButton ("Cancelar");         B2.addActionListener(this);
                T1 = new JTextField("");
                T2 = new JPasswordField("");
                T1.setEditable(true);
                T2.setEditable(true);
                
                getContentPane().add(L1);//usuario
                getContentPane().add(T1);//usuario

                getContentPane().add(L2);//senha
                getContentPane().add(T2);//adciona o label 1

                getContentPane().add(B1);//adiciona o texto 1
                getContentPane().add(B2);


}

   
    public void actionPerformed(ActionEvent e) {
       String user="Robson",Pass="123teste";
       
       
       
      if (e.getSource()==B1){
       if(i<=3 && user.equals(T1.getText())&& Pass.equals(T2.getText()) )
       { 
          Banco page = new Banco();// altertar "banco" para o nome da classe que vai ser chamada
          Login page2 = new Login();
          page.setVisible(true);
          setVisible(false);
          
       }
       else{
           if(i>=3){
           JOptionPane.showMessageDialog(null, "Usuario foi Bloqueado", "Bloqueado", JOptionPane.OK_OPTION);
           System.exit(0);
           }
           else{
           JOptionPane.showMessageDialog(null, "Senha Incorreta", "Error", JOptionPane.ERROR_MESSAGE);
           T1.setText("");
           T2.setText("");
           i++;
           System.out.println(i);
           }
       }
       }
      
      if (e.getSource()==B2){
           System.exit(0);
       }
      
           
       
       }
       
        
    
    public void textValueChanged(TextEvent e) {
    
}
}