Hi,

i would like to show a JProgessBar during a longer process. I can show
it, but I cannot get the JProgressBar to update the UI, so it just
appears and at the end it disappears again, but it's not changed in the
meantime.

Example code, JProgressBar in JDialog, Java 1.4.2:

public class DialogProgressBar extends JDialog {

  private JProgressBar jpb;

public DialogProgressBar(String title, java.awt.Frame owner, boolean
modal) {
  super(owner, title, modal);

  jpb = new JProgressBar();
  jpb.setStringPainted(true);
  this.getContentPane().add(jpb, java.awt.BorderLayout.CENTER);
  setSize(300,50);
}

public JProgressBar getProgressBar()  {
  return jpb;
}

}

and that's how I use the Dialog/JProgressBar.
...
DialogProgressBar pb = new DialogProgressBar("Titel", dialog, false);

...
public void actionPerformed(ActionEvent aE) {

  ...
  else if(cmd.equals("mniSynchronize")) {
    int selectedRows = 3;

    pb.getProgressBar().setMinimum(0);
    pb.getProgressBar().setValue(0);
    pb.getProgressBar().setMaximum(selectedRows);
    pb.setVisible(true);

    for(int i=0;i<selectedRows;i++) {

      switch(i) {
       case 1: pb.getProgressBar().setString("file001");
           storeFiletype001();
           break;

       case 2: pb.getProgressBar().setString("file002");
           storeFiletype002();
           break;

       case 3: pb.getProgressBar().setString("file003");
           storeFiletype003();
           break;
      }

      pb.getProgressBar().setValue(i+1);
    }
    pb.setVisible(false);
 }
}

Thanks,
Aloys