JLabel is in main, can I setText from a subclass?

[Dustin Yonak]

Here's my main class:

import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.*;
 
public class TestDraw
{
   public static void main( String args[] )
   {
      DrawPanel panel = new DrawPanel();
      JFrame application = new JFrame();
      JLabel status = new JLabel("Hello World");
      
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      application.add( panel );
      application.add( status, BorderLayout.SOUTH );
      application.setSize( 800, 600 );
      application.setVisible( true );
      
   } // end main
} // end class TestDraw

Withing the TestDraw class I'm trying to set the text of the status JLabel but it can't find it. It's in main because I want to add it to the application JFrame using BorderLayout.SOUTH, which I can't seem to get to work properly if I try to add the JLabel within the DrawPanel class.

[Frank Hale]

import javax.swing.*;
 
public class TestDraw
{
   public static void main( String args[] )
   {
      JPanel panel = new JPanel();
      JFrame application = new JFrame();
      JLabel status = new JLabel("Hello World");
      panel.add(status);
  
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      application.add( panel );
      application.add( status, BorderLayout.SOUTH );
      application.setSize( 800, 600 );
      application.setVisible( true );
   } 
}

I substituted your DrawPanel for a JPanel then used the JPanel add method to add the JLabel. Seems to work. Not sure if this is what you are intending to do though.

[Dustin Yonak]

Thanks Frank, that works if you only want to update the status JLabel from TestDraw but I'm trying to update in from the DrawPanel class, which I need to use. The error I get is "cannot find symbol variable status".

[Dustin Yonak]

Got it, I just moved all of the following:

     JFrame application = new JFrame();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      application.add( this );
      application.add( status, BorderLayout.SOUTH );
      application.setSize( 800, 600 );
      application.setVisible( true );

into the DrawPanel class.

[Frank Hale]

Originally posted by Dustin Yonak:
Got it, I just moved all of the following into the DrawPanel class.

I was getting ready to say if this was a subclass you created you could extend it to do the required functionality. Glad it's working for ya.

[Maneesh Godbole]

Moving to a more appropriate forum.