Re: Self-configuring classes
On Aug 3, 10:01 pm, nebulou...@gmail.com wrote:
On Aug 3, 11:56 pm, Thomas Hawtin <use...@tackline.plus.com> wrote:
Twisted wrote:
...it's quite normal to do so; a JFrame show() is very often
the last line in main().
It's normal. It's also wrong. [attempts to give me orders like he's boss of something]
Oh really? Explain then
a) Why it's normal, if what you say is true;
Because for a long time Sun's own tutorials made that mistake. At
this point other tutorials based off those original, incorrect
tutorials still exist, some of them completely unmaintained. They
have the advantage of simply having been around longer, making them
better-linked as a class, in turn improving the likelyhood one such
"bad" example will appear high in google searches for "swing tutorial"
and similar phrases.
b) Why it doesn't cause problems (and why you believe it's wrong
despite its not causing problems); and
Because it does cause problems, but not consistently. As <http://
weblogs.java.net/blog/alexfromsun/archive/2005/11/
debugging_swing_1.html> observes, sometimes even simply creating a
window from main(String...) directly can have unexpected side effects.
c) What you'd do instead (since, obviously, one has no access to the
EDT until one has shown some UI and a UI event has subsequently been
generated)
Use the example from the current Sun Swing tutorials, after verifying
for myself that it really does run the passed code on the right thread
and will actually create it if necessary. The source is, after all,
right there.
.....
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createGui();
}
});
}
private static void createGui() {
//this code must be run on EventDispatch thread!
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridBagLayout());
JEditorPane pane = new JEditorPane();
pane.setText("Edt matters!");
pane.setSelectionEnd(pane.getText().length());
frame.getContentPane().add(pane);
frame.setSize(new Dimension(200, 100));
frame.setVisible(true);
//clear selection
pane.setSelectionStart(0);
pane.setSelectionEnd(0);
}
.....
DO NOT
You do not have any right to dictate others behaviour, any more than
others have the right to dictate yours. If Thomas' behaviour bothers
you, you'll look far less foolish if you make use of your newsreader's
killfile feature and cut him from your worldview than you will trying
to order him about.
-Owen