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| Chapter 28 The java.net Package |

## 28.7 java.net.DatagramSocketImpl (JDK 1.1)

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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.

    public abstract class DatagramSocketImpl extends Object {
        // Default Constructor: public DatagramSocketImpl()
        // Protected Instance Variables
                protected FileDescriptor fd;
                protected int localPort;
        // Protected Instance Methods
                protected abstract void bind(int lport, InetAddress laddr) throws SocketException;
                protected abstract void close();
                protected abstract void create() throws SocketException;
                protected FileDescriptor getFileDescriptor();
                protected int getLocalPort();
                protected abstract byte getTTL() throws IOException;
                protected abstract void join(InetAddress inetaddr) throws IOException;
                protected abstract void leave(InetAddress inetaddr) throws IOException;
                protected abstract int peek(InetAddress i) throws IOException;
                protected abstract void receive(DatagramPacket p) throws IOException;
                protected abstract void send(DatagramPacket p) throws IOException;
                protected abstract void setTTL(byte ttl) throws IOException;
    }

java.net.DatagramSocket (JDK 1.0) |  | java.net.FileNameMap (JDK 1.1)