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

public class Hei extends JFrame
{
  private JTextArea utskrift;

  public Hei()
  {
    super( "Hei!" );
    utskrift = new JTextArea( 20, 10 );
    getContentPane().add( new JScrollPane( utskrift ) );
    pack();
    setVisible( true );
    skrivHei();
  }

  public void skrivHei()
  {
    utskrift.append( "Hei!\n" );
    skrivHei();
  }

  public static void main( String[] args )
  {
    EventQueue.invokeLater(new Runnable()
    {

      public void run()
      {
        final Hei heivindu = new Hei();
        heivindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
    });
  }
}