Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #17309

Re: jLabel setVisible(true) Doesn't Work

Show all headers | View raw

On 08/07/2012 06:22 PM, clusardi2k@aol.com wrote:
> On Tuesday, August 7, 2012 3:33:29 PM UTC-4, markspace wrote:
>   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.
>
> Does anyone have a simple working project of this:
>
> (1) It has a form with a JPanel dragged from the swing control palette,
> (2) In the JPanel a Jlabel is dragged from the swing control palette.
> (3) The jlabel is set to invisible at the start of the project.
> (4) The project becomes visible when a button is pressed.
> (5) The project becomes invisible when a button is pressed.
>
> Thanks,

No. But here's a start. You'll need add the
appropriate controls and handlers and wrap it in a project.

import javax.swing.JFrame;
import javax.swing.JLabel;

public class Scratch {

   private static void createAndShowGUI() {
     JFrame frame = new JFrame("Scratch");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     JLabel label = new JLabel("Scratch");
     frame.getContentPane().add(label);
     // label.setVisible(false);
     frame.pack();
     frame.setVisible(true);
   }

   public static void main(String[] args) {
     javax.swing.SwingUtilities.invokeLater(new Runnable() {
       public void run() {
         createAndShowGUI();
       }
     });
   }
}

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

jLabel setVisible(true) Doesn't Work clusardi2k@aol.com - 2012-08-07 12:15 -0700
  Re: jLabel setVisible(true) Doesn't Work markspace <-@.> - 2012-08-07 12:33 -0700
    Re: jLabel setVisible(true) Doesn't Work clusardi2k@aol.com - 2012-08-07 15:22 -0700
      Re: jLabel setVisible(true) Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-07 19:08 -0400
        Layout Doesn't Work (was: jLabel setVisible(true) Doesn't Work) Jeff Higgins <jeff@invalid.invalid> - 2012-08-07 22:27 -0400
          Re: Layout Doesn't Work (was: jLabel setVisible(true) Doesn't Work) clusardi2k@aol.com - 2012-08-08 05:54 -0700
            Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-08 11:22 -0400
              Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-08 14:00 -0400
            Re: Layout Doesn't Work markspace <-@.> - 2012-08-08 08:20 -0700
              Re: Layout Doesn't Work clusardi2k@aol.com - 2012-08-08 09:24 -0700
                Re: Layout Doesn't Work clusardi2k@aol.com - 2012-08-08 10:22 -0700
                Re: Layout Doesn't Work markspace <-@.> - 2012-08-08 10:31 -0700
                Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-08 13:49 -0400
                Re: Layout Doesn't Work clusardi2k@aol.com - 2012-08-08 11:15 -0700
                Re: Layout Doesn't Work markspace <-@.> - 2012-08-08 11:48 -0700
                Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-10 10:09 -0400
                Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-10 10:20 -0400
                Re: Layout Doesn't Work Jeff Higgins <jeff@invalid.invalid> - 2012-08-10 13:48 -0400
  Re: jLabel setVisible(true) Doesn't Work "John B. Matthews" <nospam@nospam.invalid> - 2012-08-07 22:09 -0400
  Re: jLabel setVisible(true) Doesn't Work Roedy Green <see_website@mindprod.com.invalid> - 2012-08-09 05:38 -0700

csiph-web