Second Layout..

I am using a frame a triple times, I mean, i want to use the same JFrame to display 3 different setup's of components in a sequencial way. First i as for to select drives, second i display a progressreport, last, user select a certificatedirectory. I am using getContentPane().removeAll() and then i add the new components but this doesn't show. The frame reamins blank after the first removeAll(). Is there some trick.??? Code follows...

class ScanForCertificateStore extends JFrame {  FindCertificates fc;  ScanForCertificateStore sfcs=this;  DefaultListModel lmRoot = new DefaultListModel();  JList lbRoot = new JList(lmRoot);  JScrollPane spRoot = new JScrollPane(lbRoot);  JButton bStartScan = new JButton("Start Scan of Selected ");  File[] Roots;  public ScanForCertificateStore (FindCertificates fc) {    this.fc = fc;    final Container p = getContentPane();    setSize(200,200);    setLocation(100,100);    p.setLayout(new BorderLayout());    p.add(spRoot,BorderLayout.CENTER);    File f = new File("\\");    Roots = f.listRoots();    for(int i=0;i<Roots.length;i++){      lmRoot.addElement(Roots[i].getAbsolutePath());    }    p.add(bStartScan,BorderLayout.SOUTH);    bStartScan.addActionListener(new ActionListener() {      public void actionPerformed(ActionEvent e) {        // dfeine new layout        JPanel aPanel = new JPanel(new BorderLayout()),            bPanel = new JPanel(new BorderLayout());        final DefaultListModel lmFound = new DefaultListModel();        JList lbFound = new JList(lmFound);        JButton bAbort = new JButton("Abort Scanning Computer"),            bSelect = new JButton("Select a Certificate Store");        final JTextArea taReport = new JTextArea("");        JScrollPane spFound = new JScrollPane(lbFound),            spReport = new JScrollPane(taReport);        aPanel.add(spReport,BorderLayout.CENTER);        aPanel.add(bAbort,BorderLayout.SOUTH);        bPanel.add(spFound,BorderLayout.CENTER);        bPanel.add(bSelect,BorderLayout.SOUTH);                p.removeAll();   // fisrt removeAll() (second isn't there jet..        p.add(aPanel,BorderLayout.NORTH); // These componets don't show up on tyhe frame...        p.add(bPanel,BorderLayout.SOUTH); //        ArrayList a = new ArrayList();        for(int i=0;i<lmRoot.size();i++) {          if(lbRoot.getSelectionModel().isSelectedIndex(i)) {            a.add(Roots[i]);          }        }        Object[] o = a.toArray();        //File[] ff= (File[]) a.toArray();        ScanComputer sc = new ScanComputer(o, sfcs.fc.tfStore.getText());        sc.addReporter(new Report() {          public void action(String msg) {            taReport.append(msg);            taReport.setCaretPosition(taReport.getText().length());            repaint();          }        });        sc.addStore(new Report () {          public void action(String msg) {            lmFound.addElement(msg);            repaint();          }        });        sc.addFinish(new Report() {          public void action (String msg) {                      }        });        sc.start();      }    });  }}

I had a problem like that recently. I'm not sure if it's the exact same thing, but try adding this line after you add all the components:

p.updateUI();

Basically it tells the frame that something has changed, and to display the change, so the stuff should show up.