Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

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;
}

Passed To

DatagramSocket.DatagramSocket( )

Returned By

DatagramSocketImplFactory.createDatagramSocketImpl(
)