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jLabel setVisible(true) Doesn't Work

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  jLabel setVisible(true) Doesn't Work "clusardi2k" <clusardi2k@1:261/38.remove-t9h-this> - 2012-08-10 18:38 +0000
    Re: jLabel setVisible(true) Doesn't Work "John B. Matthews" <john.b..matthews@1:261/38.remove-t9h-this> - 2012-08-10 18:38 +0000

#17591 — jLabel setVisible(true) Doesn't Work

From: "clusardi2k" <clusardi2k@1:261/38.remove-k2r-this>

From: "clusardi2k" <clusardi2k@1:261/38.remove-qhs-this>

From: clusardi2k@aol.com

I apologize for the simple question, but how do the label setVisible properly.

(1) I dragged a jLabel to my form. I then set it like so:

 my_jLabel.setVisible (false);

Later in the project, I set its visibility to true:

 my_jLabel.setVisible (true);

But, the label is no where to be found. That's my problem.

(2)FYI: If I do the following after setting it to true, I do see the label:

JOptionPane.showMessageDialog(null,"Is the jLable visible");

(3) Instead of using the show method, doing the following after setting the 
label visibility to true did not help.

            my_jLabel.repaint();
            my_jLabel.validate();

(4) Replacing the showMessageDialog with a sleep did not help.

(5) Replacing the above setVisible in (1) with the following code did not help:

SwingUtilities.invokeLater(new Runnable() { //The EDT (Event Dispatch Thread)
   public void run()
   {
      JLabel myLabel = new JLabel("Old Text");
      my_jLabel.setVisible (true);
   }
});

(6) Using google to search for an answer isn't helping.

Thanks,

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#17604

  To: clusardi2k
From: "John B. Matthews" <john.b..matthews@1:261/38.remove-k2r-this>

  To: clusardi2k
From: "John B. Matthews" <john.b..matthews@1:261/38.remove-qhs-this>

  To: clusardi2k
From: "John B. Matthews" <nospam@nospam.invalid>

In article <ddf6ecbb-1c20-4163-8504-bb2d8a33e41a@googlegroups.com>,
 clusardi2k@aol.com wrote:

> (3) Instead of using the show method, doing the following after
> setting the label visibility to true did not help.
>
>     my_jLabel.repaint();
>     my_jLabel.validate();

Using validate() is appropriate if you add or remove components or change the 
Container's layout, as shown here [1]. When required, repaint() should be 
invoked _after_ validate(). CardLayout, shown here [2], is often a better 
alternative.

[1] <http://stackoverflow.com/a/5751044/230513> [2]
<http://stackoverflow.com/a/5655843/230513>

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

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