Re: Canvas Wanted (simple question)
On Fri, 23 Dec 2011 17:26:54 -0800, markspace wrote:
On 12/23/2011 4:49 PM, Joerg Meier wrote:
On Sun, 11 Dec 2011 15:55:53 -0800, Knute Johnson wrote:
public static void main(String[] args) {
// create GUI on EDT (event dispatch thread)
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.add(new test(),BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
});
}
Just a small nitpicking note, this code block doesn't need to be wrapped in
invokeLater (because there is no EDT before the setVisible, so there are no
threading concerns).
Wrong. There's no defined mechanism for passing objects created on one
thread to the EDT otherwise. You still have to worry about safe
publication or now.
Also, any listeners created by Swing objects may fire, and those fire
*on the EDT*. So you may indeed get an EDT before the call to
setVisible(). Only creating these objects on the EDT is 100% safe.
Only you clearly didn't read my post other farther than "doesn't need to be
wrapped".
Liebe Gruesse,
Joerg
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