FileDescriptor

FileDescriptor

java.io

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Java 1.0

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