how can I get the url?

[Thomas]

now, there is page, the link is like this:
http://localhost:14654/aes/cTrace/default.aspx.
It contains a Java Applet. when I click a button on the Applet, I hope
get a url like this: http://localhost:14654/aes/cTrace/.
how can I get it?

Best Regards,

Thomas

 

[Simon]

now, there is page, the link is like this:
http://localhost:14654/aes/cTrace/default.aspx.
It contains a Java Applet. when I click a button on the Applet, I hope
get a url like this: http://localhost:14654/aes/cTrace/.
how can I get it?

Applet.getAppletContext().showDocument(URL) ?

Cheers,
Simon

 

[Andrew Thompson]

What exactly do you mean by 'get'?

Applet.getAppletContext().showDocument(URL) ?

This method will display a new web page (if your lucky),
but is not reliable, and I suspect not what you want..

To get an URL representing the document base, the
address of the web page itself, try..

java.applet.Applet.getDocumentBase()

...you might need to hack that a bit to get the exact information
you are after (e.g. do a String.lastIndexOf("/") to trim the tail end)

HTH

Andrew T.

 

[Simon]

What exactly do you mean by 'get'?


This method will display a new web page (if your lucky),
but is not reliable, and I suspect not what you want..

You are probably right. I was not sure what the OP was asking for, hence the
question mark. Probably your answer is the right one. I thought he wanted to
display something because that was supposed to happen after a button was clicked.

Cheers,
Simon

 

[Andrew Thompson]

....
...I was not sure what the OP was asking for, ..

I'm still not sure. Perhaps you (Thomas) can explain.

Andrew T.

 

[Thomas Fritsch]

Applet.getAppletContext().showDocument(URL) ?

In addition to what Simon and Andrew wrote:

You get the page, which contains the applet, by:
URL docBase = this.getDocumentBase();
// you'll get "http://localhost:14654/aes/cTrace/default.aspx"

You can construct new URLs from it by:
URL url = new URL(docBase, "bla.html");
// you'll get "http://localhost:14654/aes/cTrace/bla.html"
or
URL url = new URL(docBase, ".");
// you'll get "http://localhost:14654/aes/cTrace/"

Finally you can try to show this URL:
this.getAppletContext().showDocument(url);

 

[Andrew Thompson]

Thomas Fritsch wrote:
.....

URL docBase = this.getDocumentBase();
// you'll get "http://localhost:14654/aes/cTrace/default.aspx"

You can construct new URLs from it by:
URL url = new URL(docBase, "bla.html");
// you'll get "http://localhost:14654/aes/cTrace/bla.html"

Huhh!

I would not have known that if you had not mentioned it.
I would not have believed it unless I tried it and saw it work.
After revisiting the JavaDocs for that constructor again,
and having become confused by the text within the third
sentence, I *still* do not understand why it works.

It is funky though (and much better than rolling a custom
version using String.indexOf()!).

Andrew T.

 

[Thomas]

thanks, All
I hava solved my problem using the code blew:
URL codeBase = getCodeBase();
.......
about the mean of "get", I am sorry for my inattention.
I mean that: I want to get a new URL based by the URL of the Applet.
thanks!

Best Regards,
Thomas

 

[Thomas Fritsch]

Thomas Fritsch wrote:
....



Huhh!

I would not have known that if you had not mentioned it.
I would not have believed it unless I tried it and saw it work.

Andrew, nice to dumbfound you ;-)

After revisiting the JavaDocs for that constructor again,
and having become confused by the text within the third
sentence, I *still* do not understand why it works.

Agreed. The JavaDoc of URL(URL,String) is next to incomprehensible
(caused kind of StackOverflowException in my head).