Spostamento di una parola svolto in classe

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Visualizza {
JFrame f1=new JFrame("trasferimento");
JTextField t1=new JTextField();
JLabel l1=new JLabel();
JButton b1=new JButton("invio");
public Visualizza(){
f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
b1.addActionListener(new Bottone());
f1.add(BorderLayout.NORTH,t1);
f1.add(BorderLayout.CENTER,l1);
f1.add(BorderLayout.SOUTH,b1);
f1.setSize(300,300);
f1.setVisible(true);
}
public class Bottone implements ActionListener{
public void actionPerformed(ActionEvent e){
String parola =t1.getText();
l1.setText(parola);
}
}
public static void main(String[]args){
Visualizza v1=new Visualizza();
}
}