Botão.java

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.JButton;

import java.awt.Dimension;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class eventoBotao extends Janela implements ActionListener {

        JLabel     texto1, texto2 ;

        JTextField cxTexto1, cxTexto, cxTexto2 ;

        JButton    bt1 ;

        public eventoBotao(){

                super("Evento do Botão" , new Dimension(300,400));

                texto1 = new JLabel("Texto Origem") ;

                texto1.setSize(90, 20);

                texto1.setLocation(50,50);

                getContentPane().add(texto1);

                texto2 = new JLabel("Texto Destino");

                texto2.setSize(90, 20);

                texto2.setLocation(50,100);

                getContentPane().add(texto2);

                cxTexto1 = new JTextField();

                cxTexto1.setSize(150, 20);

                cxTexto1.setLocation(160,50);

                getContentPane().add(cxTexto1);

                bt1 = new JButton();

                bt1.setSize(150, 20);

                bt1.setLocation(160,50);

                getContentPane().add(bt1);

                bt1.addActionListener(this); //adiciona um ouvido no botão

        }

        public static void main(String[] args) {

                eventoBotao jan = new eventoBotao();

                jan.setVisible(true);

        }

        @Override

        public void actionPerformed(ActionEvent evento) {

                if(evento.getSource() == bt1){String valor;

                valor = cxTexto1.getText();

                cxTexto2.setText(valor);

        }

}        

}

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