Problem with scrollable pane

Question

public void ReportsOutput()
               JInternalFrame rFrame = new JInternalFrame("Reports", true, true, true, true);
               JPanel rPanel = new JPanel();
               JTextArea reports = new JTextArea(30,30);
               reports.setEditable(false);
               add(new JScrollPane(reports));
               for (int i=0; i < counter; i++)
                    reports.setText(accounts.toString());
               rPanel.add(reports);
               rFrame.add(rPanel, BorderLayout.CENTER);
               rFrame.setVisible(true);
               rFrame.setSize(768,480);
               appDesktop.add(rFrame);
               appDesktop.removeAll();
               appDesktop.add(rFrame);
               appDesktop.validate();
               appDesktop.repaint();
This should add a scrollable pane to the text area. It does not it only shows one array element. Is there something i am overlooking when i add the scrollable pane?

Answer 1

First you add the JTextArea to the scrollpane:
add(new JScrollPane(reports));Then, later on, you add the same JTextArea to a JPanel:
rPanel.add(reports);A component such as a JTextArea can only belong to one parent. When you add the JTextArea to the JPanel, it is effectively removed from the scrollpane.
Edit: Btw, in the future should should preferrably post Swing questions in the Swing forum.