public abstract class SocketImpl extends Object {
    // Default Constructor: public SocketImpl()
    // Protected Instance Variables
            protected InetAddress address;
            protected FileDescriptor fd;
            protected int localport;
            protected int port;
    // Public Instance Methods
            public String toString();  // Overrides Object
    // Protected Instance Methods
            protected abstract void accept(SocketImpl s) throws IOException;
            protected abstract int available() throws IOException;
            protected abstract void bind(InetAddress host, int port) throws IOException;
            protected abstract void close() throws IOException;
            protected abstract void connect(String host, int port) throws IOException;
            protected abstract void connect(InetAddress address, int port) throws IOException;
            protected abstract void create(boolean stream) throws IOException;
            protected FileDescriptor getFileDescriptor();
            protected InetAddress getInetAddress();
            protected abstract InputStream getInputStream() throws IOException;
            protected int getLocalPort();
            protected abstract OutputStream getOutputStream() throws IOException;
            protected int getPort();
            protected abstract void listen(int backlog) throws IOException;
}