JTextArea not appearing in JDialog

[Scott Krasnigor]

I have a simple JDialog that gets envoked on a certain event. It contains a JScrollArea with a JTextArea attached. When my Dialog is displayed, the text area is not visible. Any assistance would be appreciated.the code is below:

  
public class GuessResultDialog extends JDialog implements ActionListener{
 
private JTextArea resultTextArea;
private BrowserView browser;
private JButton closeButton;
private JButton querySelectionButton;
private JScrollPane resultScrollPane;

 
/**
 * Create the dialog
 */
public GuessResultDialog(JFrame parentFrame, boolean model) {
super(parentFrame, model);
 
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
getContentPane().setLayout(null);
setTitle("c o n c e p t n e t  t o p i c  g u e s s");
setSize(new Dimension(498, 668));
setMinimumSize(new Dimension(498, 668));
setBounds(100, 100, 498, 668);
final TitledBorder titledBorder = new TitledBorder(new BevelBorder(
BevelBorder.LOWERED), "t  o  p  i  c  s", 
TitledBorder.DEFAULT_JUSTIFICATION, 
TitledBorder.DEFAULT_POSITION, null, null);
titledBorder.setTitleFont(new Font("Tahoma", Font.BOLD, 12));
 
final JPanel buttonPanel = new JPanel();
buttonPanel.setBorder(new CompoundBorder(new BevelBorder(
BevelBorder.RAISED), new BevelBorder(BevelBorder.LOWERED)));
buttonPanel.setLayout(null);
buttonPanel.setBounds(22, 573, 445, 51);
getContentPane().add(buttonPanel);
 
querySelectionButton = new JButton();
querySelectionButton.addActionListener(this);
querySelectionButton.setText("Query Selection");
querySelectionButton.setBounds(10, 12, 135, 26);
buttonPanel.add(querySelectionButton);
 
closeButton = new JButton();
closeButton.addActionListener(this);
closeButton.setText("Close");
closeButton.setBounds(302, 12, 133, 26);
buttonPanel.add(closeButton);
 
resultScrollPane = new JScrollPane();
resultScrollPane.setLayout(null);
resultScrollPane.setBounds(22, 21, 445, 546);
getContentPane().add(resultScrollPane);
 
final JScrollBar scrollBar = new JScrollBar();
resultScrollPane.setCorner(JScrollPane.LOWER_RIGHT_CORNER, scrollBar);
 
resultTextArea = new JTextArea();
resultTextArea.setText("test text");
resultScrollPane.setViewportView(resultTextArea);
resultTextArea.setBackground(Color.WHITE);
resultTextArea.setBorder(titledBorder);
resultTextArea.setLineWrap(true);
resultTextArea.setFont(new Font("Tahoma", Font.PLAIN, 14));
}

public void setBrowserView(BrowserView view) {
this.browser = view;
}
 
public void actionPerformed(ActionEvent event) {
if(event.getSource() == closeButton) {
this.setVisible(false);
this.dispose();
} else if(event.getSource() == querySelectionButton) {
String query = resultTextArea.getSelectedText();
browser.performWebSearch(query);
}
}
}
 

[Rob Spoor]

Remove this line:

resultScrollPane.setLayout(null);

This causes the scroll pane's viewport to not be shown unless you specify the bounds.

Please note that it's an overall bad idea to use null as layout managers; your code just shows one of the reasons.

Also, if I were you I'd call setResizable(false) on your dialog if you're keeping this setup, because the controls stay in their old place if you resize the dialog.

[Scott Krasnigor]

Thanks for your prompt response. Works just fine.