public abstract class ContentHandler extends Object
getContent()
method in the
URL
class or the URLConnection
class will cause
an instance of a subclass of ContentHandler
to be created for
the MIME type of the object being downloaded from the URL. Thus, this
class is seldom needed by applications/applets directly, but only
indirectly through methods in other classes.Constructor and Description |
---|
ContentHandler()
Default, no-argument constructor.
|
Modifier and Type | Method and Description |
---|---|
abstract Object |
getContent(URLConnection urlc)
This method reads from the
InputStream of the passed in URL
connection and uses the data downloaded to create an Object
represening the content. |
Object |
getContent(URLConnection urlc,
Class[] classes)
This method reads from the
InputStream of the passed in URL
connection and uses the data downloaded to create an Object
represening the content. |
public ContentHandler()
public abstract Object getContent(URLConnection urlc) throws IOException
InputStream
of the passed in URL
connection and uses the data downloaded to create an Object
represening the content. For example, if the URL is pointing to a GIF
file, this method might return an Image
object. This method
must be implemented by subclasses.urlc
- A URLConnection
object to read data from.IOException
- If an error occurspublic Object getContent(URLConnection urlc, Class[] classes) throws IOException
InputStream
of the passed in URL
connection and uses the data downloaded to create an Object
represening the content. For example, if the URL is pointing to a GIF
file, this method might return an Image
object. This method
must be implemented by subclasses. This method uses the list of
supplied classes as candidate types. If the data read doesn't match
any of the supplied type, null
is returned.urlc
- A URLConnection
object to read data from.classes
- An array of types of objects that are candidate types
for the data to be read.null
if the data does not match any of the candidate types.IOException
- If an error occurs