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Java Fundamental Classes Reference

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The java.net Package
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ContentHandler

Name

ContentHandler

Synopsis

Class Name:

java.net.ContentHandler

Superclass:

java.lang.Object

Immediate Subclasses:

None

Interfaces Implemented:

None

Availability:

JDK 1.0 or later

Description

The ContentHandler class is an abstract class that defines a method to read data from a URLConnection and then create an Object appropriate for the type of content it has read. Each subclass of ContentHandler handles a specific type of content (i.e., MIME type).

You do not create ContentHandler objects directly; they are created by an object that implements the ContentHandlerFactory interface. A ContentHandlerFactory object selects and creates an appropriate ContentHandler for the content type. If you write your own ContentHandler subclasses, you should also write your own ContentHandlerFactory. The content handler factory for an application is set by a call to URLConnection.setContentHandlerFactory().

An application does not normally call the getContent() method of a ContentHandler directly; it should call URL.getContent() or URLConnection.getContent() instead.

A ContentHandler works in conjunction with a URLStreamHandler, but their roles do not overlap. The URLStreamHandler deals with the specifics of a protocol, such as negotiating with a server to retrieve a resource, while the ContentHandler expects a data stream from which it can construct an object.

Class Summary

public abstract class java.net.ContentHandler extends java.lang.Object {
  // Instance Methods
  public abstract Object getContent(URLConnection urlc) throws IOException;
}

Instance Methods

getContent

 public abstract Object getContent(URLConnection urlc) throws IOException 

Parameters

urlc

A URLConnection that is the data source.

Returns

The Object created from the data source.

Throws

IOException

If any kind of I/O error occurs.

Description

This method reads data from the given URLConnection and returns the object that is represented by the data.

Inherited Methods

Method

Inherited From

Method

Inherited From

clone()

Object

equals(Object)

Object

finalize()

Object

getClass()

Object

int hashCode()

Object

notify()

Object

notifyAll()

Object

toString()

Object

wait()

Object

wait(long)

Object

wait(long, int)

Object

   

See Also

ContentHandlerFactory, IOException, URL, URLConnection, URLStreamHandler


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