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From: Sal on 12 Jul 2010 17:41
In the following test applet, I would like to have the "Begin counting
" display immediately, and the "End counting" to display when
finished, instead the applet waits until the end of the counting loop
and then displays the text all at once. How can I get it to work
properly?

public class Test extends JApplet {



JScrollPane scrollPane;

JTextArea textArea;



Color darkGreen = new Color( 0, 160, 0 ); //medium dark green



int nbrOfTimes = 0x7fffffff;



private void setNativeLookAndFeel() {

try {


UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch(Exception e) {

textArea.append("Error setting native LAF: " + e + "\n");

}

}



public void init() {

setNativeLookAndFeel();

Container cp = getContentPane();

cp.setBackground( darkGreen );

cp.setLayout( new FlowLayout() );


textArea = new JTextArea(30, 40);

scrollPane = new JScrollPane();

cp.add ( new JScrollPane( textArea ) );

textArea.setEditable( false );
textArea.append( "Begin counting " + nbrOfTimes +" \n" ); //
<------ look here
int ctr = 0;
while( ++ctr < nbrOfTimes );
textArea.append( "End counting " + ctr +" \n" );
// <------- look here
}

}
From: Joshua Cranmer on 12 Jul 2010 18:25
On 07/12/2010 05:41 PM, Sal wrote:
> In the following test applet, I would like to have the "Begin counting
> " display immediately, and the "End counting" to display when
> finished, instead the applet waits until the end of the counting loop
> and then displays the text all at once. How can I get it to work
> properly?

Answer the following questions:
1. What are the methods called over the lifecycle of an applet, and in
what order?
2. On what thread or threads are these methods called?
3. When is the content of an applet actually displayed?

If you can correctly answer all three questions, you should realize why
the text displays all at once. Moving some of the code elsewhere will
ameliorate this problem; which code and where is left as an exercise to
the reader.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth
From: Sal on 12 Jul 2010 18:41
On Jul 12, 3:25 pm, Joshua Cranmer <Pidgeo...(a)verizon.invalid> wrote:
> On 07/12/2010 05:41 PM, Sal wrote:
>
> > In the following test applet, I would like to have the "Begin counting
> > " display immediately, and the "End counting" to display when
> > finished, instead the applet waits until the end of the counting loop
> > and then displays the text all at once. How can I get it to work
> > properly?
>
> Answer the following questions:
> 1. What are the methods called over the lifecycle of an applet, and in
> what order?
> 2. On what thread or threads are these methods called?
> 3. When is the content of an applet actually displayed?
>
> If you can correctly answer all three questions, you should realize why
> the text displays all at once. Moving some of the code elsewhere will
> ameliorate this problem; which code and where is left as an exercise to
> the reader.
>
> --
> Beware of bugs in the above code; I have only proved it correct, not
> tried it. -- Donald E. Knuth

Thanks for your reply. You are very lucky as it's obvious you were
never a beginner.
From: Jeff Higgins on 12 Jul 2010 19:58
On 7/12/2010 6:41 PM, Sal wrote:
> On Jul 12, 3:25 pm, Joshua Cranmer<Pidgeo...(a)verizon.invalid> wrote:
>> On 07/12/2010 05:41 PM, Sal wrote:
>>
>>> In the following test applet, I would like to have the "Begin counting
>>> " display immediately, and the "End counting" to display when
>>> finished, instead the applet waits until the end of the counting loop
>>> and then displays the text all at once. How can I get it to work
>>> properly?
>>
>> Answer the following questions:
>> 1. What are the methods called over the lifecycle of an applet, and in
>> what order?
>> 2. On what thread or threads are these methods called?
>> 3. When is the content of an applet actually displayed?
>>
>> If you can correctly answer all three questions, you should realize why
>> the text displays all at once. Moving some of the code elsewhere will
>> ameliorate this problem; which code and where is left as an exercise to
>> the reader.
>>
>
> Thanks for your reply. You are very lucky as it's obvious you were
> never a beginner.

A good place for beginners is the Java Tutorials.
<http://download.oracle.com/docs/cd/E17409_01/javase/tutorial/index.html>

Under the section "Trails Coverings the Basics",
"Deployment" includes a trail on Java Applets.

Under the section "Creating a GUI with Swing" you can learn about Text
Components and Events.

As always:
The Java SE 6 Documentation
<http://download.oracle.com/docs/cd/E17409_01/javase/6/docs/> and
The Java SE 6 API Specification
<http://download-llnw.oracle.com/docs/cd/E17409_01/javase/6/docs/api/>


From: Jeff Higgins on 12 Jul 2010 20:16
On 7/12/2010 6:41 PM, Sal wrote:
> On Jul 12, 3:25 pm, Joshua Cranmer<Pidgeo...(a)verizon.invalid> wrote:
>> On 07/12/2010 05:41 PM, Sal wrote:
>>
>>> In the following test applet, I would like to have the "Begin counting
>>> " display immediately, and the "End counting" to display when
>>> finished, instead the applet waits until the end of the counting loop
>>> and then displays the text all at once. How can I get it to work
>>> properly?
>>
>> Answer the following questions:
>> 1. What are the methods called over the lifecycle of an applet, and in
>> what order?
>> 2. On what thread or threads are these methods called?
>> 3. When is the content of an applet actually displayed?
>>
>> If you can correctly answer all three questions, you should realize why
>> the text displays all at once. Moving some of the code elsewhere will
>> ameliorate this problem; which code and where is left as an exercise to
>> the reader.
>>
> Thanks for your reply. You are very lucky as it's obvious you were
> never a beginner.

Many of the more experienced readers of this group began at the
beginning and worked through the basics by reading the documentation and
writing code and experimenting. A beginner following this path will
quickly become confident in their knowledge of the basics. See my other
post for pointers toward the beginning.



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