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POJComobox is not showing in the JDialog
 

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  1. POJComobox is not showing in the JDialog
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    <p>I have 2 classes. when I put bold 3 lines in the method addCourses() the dialog does not show combobox in the Panel but when I remove from addCourses and put those bold lines in the constructor, JComboBox are shown in the Panel.</p> <p>But data will not show because data items updates to ComboBox will happen after Constructor is created.</p> <p>How can I solve this problem.</p> <hr> <p><b> this.mainPanel.add(courseCombo, BorderLayout.NORTH);<br> this.mainPanel.add(sessionCombo, BorderLayout.CENTER);<br> this.mainPanel.add(courseButton, BorderLayout.SOUTH);<br></b></p> <hr> <pre><code>public class Updator { CourseListFrame clf = new CourseListFrame(); for(...){ clf.addContentsToBox(displayName, className); } clf.addCourses(); } </code></pre> <p>and second class is </p> <pre><code>public class CourseListFrame extends JDialog implements ActionListener { public JPanel mainPanel = new JPanel(new BorderLayout(2, 2)); public JButton courseButton = new JButton(("Submit")); public JComboBox courseCombo; public JComboBox sessionCombo; public Multimap&lt;String, String&gt; map; // = HashMultimap.create(); public static CourseListFrame courseListDialog; public CourseListFrame() { super(this.getMainFrame()); this.getContentPane().add(mainPanel); map = HashMultimap.create(); courseCombo = new JComboBox(); courseCombo.addItem("Select Courses"); courseCombo.addActionListener(this); sessionCombo = new JComboBox(); } public void addContentsToBox(String course, String session) { map.put(course, session); courseCombo.addItem(course); } public void actionPerformed(ActionEvent e) { JComboBox cb = (JComboBox) e.getSource(); String str = (String) cb.getSelectedItem(); setSessionCombo(str); } public void setSessionCombo(String course) { if (map.containsKey(course)) { sessionCombo.removeAllItems(); Iterator it = map.get(course).iterator(); while (it.hasNext()) { sessionCombo.addItem(it.next()); } } } public void addCourses() { this.mainPanel.add(courseCombo, BorderLayout.NORTH); this.mainPanel.add(sessionCombo, BorderLayout.CENTER); this.mainPanel.add(courseButton, BorderLayout.SOUTH); } public static void showCourseListDialog() { if (courseListDialog == null) { courseListDialog = new CourseListFrame(); } courseListDialog.pack(); courseListDialog.setVisible(true); courseListDialog.setSize(260, 180); } } </code></pre>
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    1. USKevin Bourrillion
    1. USPujan Srivastava
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    1. COthe use of `this` in your call to `super()` shouldnt compile.
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      1. POJComobox is not showing in the JDialog
      1. USakf
    2. COQuit cross posting: http://forums.sun.com/thread.jspa?threadID=5441271&tstart=0. Spend more time asking a proper question with supporting code and less time cross posting. You still have not produced a proper SSCCE and therefore you still don't have your answer.
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      1. POJComobox is not showing in the JDialog
      1. UScamickr
 

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