This abstract class defines the methods
necessary to implement communication through datagram and multicast
sockets. System programmers may create subclasses of this class when
they need to implement datagram or multicast sockets in a nonstandard
network environment, such as behind a firewall or on a network that
uses a nonstandard transport protocol. Normal applications never need
to use or subclass this class.
Figure 12-3. java.net.DatagramSocketImpl
public abstract class
DatagramSocketImpl implements SocketOptions {
// Public Constructors
public
DatagramSocketImpl ( );
// Protected Instance Methods
protected abstract void
bind (int
lport , InetAddress
laddr )
throws SocketException;
protected abstract void
close ( );
1.4 protected void
connect (InetAddress
address , int
port )
throws SocketException; empty
protected abstract void
create ( ) throws SocketException;
1.4 protected void
disconnect ( ); empty
protected java.io.FileDescriptor
getFileDescriptor ( );
protected int
getLocalPort ( );
1.2 protected abstract int
getTimeToLive ( ) throws java.io.IOException;
protected abstract void
join (InetAddress
inetaddr )
throws java.io.IOException;
1.4 protected abstract void
joinGroup (SocketAddress
mcastaddr , NetworkInterface
netIf ) throws java.io.IOException;
protected abstract void
leave (InetAddress
inetaddr )
throws java.io.IOException;
1.4 protected abstract void
leaveGroup (SocketAddress
mcastaddr , NetworkInterface
netIf ) throws java.io.IOException;
protected abstract int
peek (InetAddress
i ) throws java.io.IOException;
1.4 protected abstract int
peekData (DatagramPacket
p ) throws java.io.IOException;
protected abstract void
receive (DatagramPacket
p ) throws java.io.IOException;
protected abstract void
send (DatagramPacket
p ) throws java.io.IOException;
1.2 protected abstract void
setTimeToLive (int
ttl ) throws java.io.IOException;
// Protected Instance Fields
protected java.io.FileDescriptor
fd ;
protected int
localPort ;
// Deprecated Protected Methods
# protected abstract byte
getTTL ( ) throws java.io.IOException;
# protected abstract void
setTTL (byte
ttl ) throws java.io.IOException;
}