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

class Sving {

    public static void main(String[] args) {
        JFrame vindu = new JFrame();
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JPanel panel = new JPanel();

        JLabel text = new JLabel("Text");
        JButton knapp = new JButton("Knapp");
        JTextField input = new JTextField("Skriv inn noe her: ");

        knapp.addActionListener(new Klikk(text, input));


        panel.add(text);
        panel.add(knapp);
        panel.add(input);

        vindu.add(panel);

        vindu.pack();
        vindu.setVisible(true);
        
    }
}

class Klikk implements ActionListener {

    JLabel output;
    JTextField input;

    Klikk(JLabel o, JTextField i) {
        output = o;
        input = i;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        output.setText(input.getText());
        input.setText("Skriv inn noe annet: ");
    }
}