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

public class Hilsen {
    private JFrame vindu;
    private JPanel hovedpanel;
    private JPanel innhold;
    private JLabel hilsetekst;
    private JTextField navnefelt;
    private JButton hilseknapp;
    private JButton resetknapp;

    public void init() {
        try {
            UIManager.setLookAndFeel(
                UIManager.getCrossPlatformLookAndFeelClassName()
            );
        } catch (Exception e) {
            System.exit(1);
        }

        vindu = new JFrame("Hilsen");
        vindu.setPreferredSize(new Dimension(600, 300));
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        hovedpanel = new JPanel(new BorderLayout());
        innhold = new JPanel(new FlowLayout(FlowLayout.CENTER, 10, 30));

        hilsetekst = new JLabel("Hilsen!");
        innhold.add(hilsetekst);

        navnefelt = new JTextField(15);
        innhold.add(navnefelt);

        hilseknapp = new JButton("Hils!");
        innhold.add(hilseknapp);

        resetknapp = new JButton("Reset");
        innhold.add(resetknapp);

        hilseknapp.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String navn = navnefelt.getText().trim();
                String tekst = "Hei " + navn + "!";
                Thread tr?d = new Thread(new HilseTr?d(hilsetekst, tekst));
                tr?d.start();
            }
        });

        resetknapp.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                navnefelt.setText("");
                hilsetekst.setText("Hilsen!");
            }
        });

        hovedpanel.add(innhold, BorderLayout.CENTER);
        vindu.add(hovedpanel);

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

    public static void main(String[] args) {
        Hilsen h = new Hilsen();
        h.init();
    }
}