java.io
Class FileDescriptor
This class represents an opaque file handle as a Java class. It should
be used only to pass to other methods that expect an object of this
type. No system specific information can be obtained from this object.
static FileDescriptor | err- A
FileDescriptor representing the system standard error
stream.
|
static FileDescriptor | in- A
FileDescriptor representing the system standard input
stream.
|
static FileDescriptor | out- A
FileDescriptor representing the system standard output
stream.
|
FileDescriptor()- This method is used to initialize an invalid FileDescriptor object.
|
void | sync()- This method forces all data that has not yet been physically written to
the underlying storage medium associated with this
FileDescriptor
to be written out.
|
boolean | valid()- This methods tests whether or not this object represents a valid open
native file handle.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
err
public static final FileDescriptor err
A FileDescriptor representing the system standard error
stream. This will usually be accessed through the
System.errvariable.
in
public static final FileDescriptor in
A FileDescriptor representing the system standard input
stream. This will usually be accessed through the
System.invariable.
out
public static final FileDescriptor out
A FileDescriptor representing the system standard output
stream. This will usually be accessed through the
System.outvariable.
FileDescriptor
public FileDescriptor()
This method is used to initialize an invalid FileDescriptor object.
sync
public void sync()
throws SyncFailedException This method forces all data that has not yet been physically written to
the underlying storage medium associated with this
FileDescriptor
to be written out. This method will not return until all data has
been fully written to the underlying device. If the device does not
support this functionality or if an error occurs, then an exception
will be thrown.
valid
public boolean valid()
This methods tests whether or not this object represents a valid open
native file handle.
true if this object represents a valid
native file handle, false otherwise
FileDescriptor.java -- Opaque file handle class
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
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