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Groups > comp.lang.java.programmer > #17590

Re: jLabel setVisible(true) Doesn't Work

From "markspace" <markspace@1:261/38.remove-t9h-this>
Subject Re: jLabel setVisible(true) Doesn't Work
Message-ID <50254C4A.56537.calajapr@time.synchro.net> (permalink)
Newsgroups comp.lang.java.programmer
References <50254C4A.56536.calajapr@time.synchro.net>
Date 2012-08-10 18:38 +0000
Organization tds.net

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

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

  To: clusardi2k
From: markspace <-@.>

On 8/7/2012 12:15 PM, clusardi2k@aol.com wrote:

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


The second to the last line is the problem.  Your label has to be inside 
another component (a container) to be visible.  Changing a local variable will 
never work.  Even changing an instance field won't work unless you've specially 
defined your own component somehow.

Most Swing components are also containers.  However normally you use JFrame and 
JPanel as your containers.  Call the add method, or use the GUI layout tool to 
just drag and drop components onto one.

This might help:

<http://docs.oracle.com/javase/tutorial/uiswing/components/panel.html>

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Re: jLabel setVisible(true) Doesn't Work "markspace" <markspace@1:261/38.remove-t9h-this> - 2012-08-10 18:38 +0000
  Re: 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 "Jeff Higgins" <jeff.higgins@1:261/38.remove-t9h-this> - 2012-08-10 18:38 +0000
      Layout Doesn't Work (was: jLabel setVisible(true) Doesn't Work) "Jeff Higgins" <jeff.higgins@1:261/38.remove-t9h-this> - 2012-08-10 18:38 +0000

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