Have you looked at the Processing reference?

You can use loadXML() or loadStrings().

yes,
sorry I made a mistake, I tried with loadXML() and not with importXML() (who don't exist).
I just try loadStrings() but it returns only this : [Ljava.lang.String;@4bf54c5f
whereas I'd like to have all the html page.
thanks,

" it returns only this : [Ljava.lang.String;@4bf54c5f"
That's an array of strings, although I wonder how you got this result...
loadStrings() indeed return an array of strings, one string per line of HTML code.

Again, look at the reference: http://processing.org/reference/loadStrings_.html

Because your method of guessing what might work isn't as efficient as you hoped.

true,
thank you
in fact the problem become from my println() option.

1. String[] html = loadStrings("http://b.kostrzewa.free.fr/html/cours/page1.htm");
2. println("this is the html ****************" +'\n' +html);

returns

this is the html ****************
[Ljava.lang.String;@a7e8c4d

but  just : println(html) ; print all the web page as an array of Strings. like I want.
thanks.

but that surprise me that this doesnt't work :

1. XML html = loadXML("http://tel.archives-ouvertes.fr/tel-00693344");
2. println( html);

 it print :

[Fatal Error] :80:128: The reference to entity "b_type" must end with the ';' delimiter. ...

whereas the document is well some xml format because the first line is :

<?xml version="1.0" encoding="utf-8"?>

Humans do errors:
http://validator.w3.org/check?uri=http%3A%2F%2Ftel.archives-ouvertes.fr%2Ftel-00693344&charset=%28detect+automatically%29&doctype=Inline&group=0
Invalid XHTML exists, alas... Browsers cope with it (they are used to invalid HTML, if they were strict, half the Web wouldn't be readable), but not XML parsers.