Actividad 5 - Sesión 9

import javax.swing.*;
import java.awt.event.*;
public class Formulario extends JFrame implements ActionListener{
    private JTextField textfield1;
    private JLabel label1;
    private JButton boton1;
    public Formulario() {
        setLayout(null);
        label1=new JLabel("Usuario:");
        label1.setBounds(10,10,100,30);
        add(label1);
        textfield1=new JTextField();
        textfield1.setBounds(120,10,150,20);
        add(textfield1);
        boton1=new JButton("Aceptar");
        boton1.setBounds(10,80,100,30);
        add(boton1);
        boton1.addActionListener(this);
    }
    
    public void actionPerformed(ActionEvent e) {
        if (e.getSource()==boton1) {
            String cad=textfield1.getText();
            setTitle(cad);
        }
    }
    
    public static void main(String[] ar) {
        Formulario formulario1=new Formulario();
        formulario1.setBounds(0,0,350,170);
        formulario1.setVisible(true);
        formulario1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}