This abstract class defines the methods necessary to implement communication through sockets. Different subclasses of this class may provide different implementations suitable in different environments (such as behind firewalls). These socket implementations are used by the Socket and ServerSocket classes. Normal applications never need to use or subclass this class.

Figure 12-20. java.net.SocketImpl

public abstract class SocketImpl implements SocketOptions {
// Public Constructors
     public SocketImpl( );  
// Public Methods Overriding Object
     public String toString( );  
// Protected Instance Methods
     protected abstract void accept(SocketImpl s) throws java.io.IOException;  
     protected abstract int available( ) throws java.io.IOException;  
     protected abstract void bind(InetAddress host, int port) 
     throws java.io.IOException;  
     protected abstract void close( ) throws java.io.IOException;  
     protected abstract void connect(String host, int port) 
throws java.io.IOException;  
     protected abstract void connect(InetAddress address, int port) 
throws java.io.IOException;  
1.4  protected abstract void connect(SocketAddress address, int timeout) 
throws java.io.IOException;  
     protected abstract void create(boolean stream) throws java.io.IOException;  
     protected java.io.FileDescriptor getFileDescriptor( );  
     protected InetAddress getInetAddress( );  
     protected abstract java.io.InputStream getInputStream( ) 
     throws java.io.IOException;  
     protected int getLocalPort( );  
     protected abstract java.io.OutputStream getOutputStream( ) 
     throws java.io.IOException;  
     protected int getPort( );  
     protected abstract void listen(int backlog) throws java.io.IOException;  
1.4  protected abstract void sendUrgentData(int data) throws java.io.IOException;  
5.0  protected void setPerformancePreferences(int connectionTime, int latency, 
int bandwidth);     empty
1.3  protected void shutdownInput( ) throws java.io.IOException;  
1.3  protected void shutdownOutput( ) throws java.io.IOException;  
1.4  protected boolean supportsUrgentData( );    constant
// Protected Instance Fields
     protected InetAddress address;  
     protected java.io.FileDescriptor fd;  
     protected int localport;  
     protected int port;  
}

Passed To

Socket.Socket( )

Returned By

SocketImplFactory.createSocketImpl( )