Java Reference
In-Depth Information
} else
{
buffer.append((char) ch);
}
}
}
/**
* The main method, create a new instance of the object and call
* process.
* @param args not used.
*/
public static void main(String args[])
{
try
{
URL u = new URL("http://www.httprecipes.com/1/6/link.php");
ExtractLinks parse = new ExtractLinks();
parse.process(u, 1);
} catch (Exception e)
{
e.printStackTrace();
}
}
}
The
process
method of
ExtractLinks
is called to process the hyperlinks. The
method begins by creating a few variables that are needed to process the links. This method
begins by opening an
InputStream
to the URL that contains the table. A
ParseHTML
object is created to parse this
InputStream
. A variable named
buffer
is created to
hold the data for each link.
String value = "";
InputStream is = url.openStream();
ParseHTML parse = new ParseHTML(is);
StringBuilder buffer = new StringBuilder();
The method loops across every tag and text character in the HTML file.
int ch;
while ((ch = parse.read()) != -1)
{
When an HTML tag is found it is checked to see if it is an <a> tag. If the tag is an anchor
then the
href
attribute is saved to the
value
variable. Additionally, the
buffer
variable
is cleared.
if (ch == 0)
{
