import javax.swing.ProgressMonitor;
import javax.swing.SwingUtilities;

public class MachWas extends Thread {
    
    private ProgressMonitor pm;
    
    int i = 0;
    
    public MachWas(){
        pm = new ProgressMonitor(null, "Fortschritt anzeigen", "", 0, 100);
        pm.setMillisToDecideToPopup(1);
    }
    
    public void run(){
        try {
            machDochWas();
        } catch (Exception e) {
        }        
    }
    
    public void machDochWas(){
        while (!pm.isCanceled() && i<=100) {
            pm.setNote(new Integer(i).toString());
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    pm.setProgress(i);
                }
            });

            System.out.println(i);
            // statt rechenintensiver Aktion
            // Thread kurz unterbrechen
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            
            i++;
        }
    }

}