Threading Swing, is this correct?

Question

Hey guys
Ive just done a little swing window, that is thread safe... well i think it is, im asking you guys if this is the correct way to create a swing app (composition rather than inheritance) and if i add more comonents will they each (e.g JButton) need to be implemented as threads?
any help and your experience would be great
cheers
This is the code for a simple window, Is it how you pros would do it?:
import javax.swing.JFrame;
import java.lang.*;
public class UI implements Runnable
private JFrame wnd = new JFrame("CLIENT");
public void createWnd()
wnd.setSize(400, 400);
wnd.setDefaultCloseOperation(wnd.EXIT_ON_CLOSE);
wnd.setVisible(true);
public void run()
createWnd();
System.out.println("Thread started");
public boolean closed()
if((wnd.getDefaultCloseOperation()) == wnd.EXIT_ON_CLOSE)
return true;
return false;
//System.out.println("pressed closed");
public static void main(String[] args)
UI appWindow = new UI();
Thread t = new Thread(appWindow);
t.start();
if(appWindow.closed())
t = null;
System.out.println("Thread stopped");
} Message was edited by:
FatClient

Answer 1

So the reason that a swing application needs to be on
the EDT of each swing UI (and not on a user thread)
is because thats the queue that holds keystrokes,
mouse clicks, etc that may need the UI to be redrawn
after an event.
And if you had other code going on, this would not be
interrupted/paused whilst the EDT/GUI were working to
redraw a bit of the app - Bcause it is in a THREAD.Swing sets up the EDT (Event Dispatch Thread), and what it does is
pretty simple: it dequeues swing events like mouse events and
keyboard events, etc... and causes the appropriate listener methods
to be called. So for example, ActionListener's actionPerformed methods
are going to be called on the EDT (if you coded correctly).
In Java you are free to create other threads, but you always have to
be careful when multiple threads access common data. In the case
of Swing, to keep its implementation as simple as possible, most
Swing methods are meant to only be called from the EDT.
Please let me know if thats why i should blindly
listen to the JDK tutorials as if it were some sort
of bible/Torah/Quran The Java Language Specification (JLS) is the Koran. The tutorials are the Hadith :-)