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This class is a platform-independent
representation of a low-level
handle to an open file or socket. The
static in
, out, and
err variables are
FileDescriptor objects that represent the standard
input, output, and error streams, respectively. There is no public
constructor method to create a FileDescriptor
object. You can obtain one with the getFD(
) method
of FileInputStream,
FileOutputStream, or
RandomAccessFile.
public final class FileDescriptor {
// Public Constructors
public FileDescriptor ( );
// Public Constants
public static final FileDescriptor err ;
public static final FileDescriptor in ;
public static final FileDescriptor out ;
// Public Instance Methods
1.1 public void sync ( ) throws SyncFailedException; native
public boolean valid ( );
}Passed To
FileInputStream.FileInputStream( ),
FileOutputStream.FileOutputStream( ),
FileReader.FileReader( ),
FileWriter.FileWriter( ),
SecurityManager.{checkRead( ),
checkWrite( )}
Returned By
FileInputStream.getFD( ),
FileOutputStream.getFD( ),
RandomAccessFile.getFD( ),
java.net.DatagramSocketImpl.getFileDescriptor( ),
java.net.SocketImpl.getFileDescriptor( )
Type Of
java.net.DatagramSocketImpl.fd,
java.net.SocketImpl.fd
