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Summary: Fields | Ctors | Methods | Inherited Methods | [Expand All]

Since: API Level 1

public final class

FileDescriptor

extends Object

java.lang.Object
↳	java.io.FileDescriptor

Class Overview

Wraps a Unix file descriptor. It's possible to get the file descriptor used by some classes (such as FileInputStream, FileOutputStream, and RandomAccessFile), and then create new streams that point to the same file descriptor.

Summary

Fields
public static final FileDescriptor	err	Corresponds to `stderr`.
public static final FileDescriptor	in	Corresponds to `stdin`.
public static final FileDescriptor	out	Corresponds to `stdout`.

Public Constructors
	FileDescriptor() Constructs a new invalid FileDescriptor.

Public Methods
void	sync() Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.
String	toString() Returns a string containing a concise, human-readable description of this object.
boolean	valid() Tests whether this `FileDescriptor` is valid.

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Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Fields

public static final FileDescriptor err

Since: API Level 1

Corresponds to stderr.

public static final FileDescriptor in

Since: API Level 1

Corresponds to stdin.

public static final FileDescriptor out

Since: API Level 1

Corresponds to stdout.

Public Constructors

public FileDescriptor ()

Since: API Level 1

Constructs a new invalid FileDescriptor.

Public Methods

public void sync ()

Since: API Level 1

Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.

Throws

SyncFailedException

public String toString ()

Since: API Level 1

Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

   getClass().getName() + '@' + Integer.toHexString(hashCode())

See Writing a useful toString method if you intend implementing your own toString method.

Returns

a printable representation of this object.

public boolean valid ()

Since: API Level 1

Tests whether this FileDescriptor is valid.

Results

Interfaces

Classes

Exceptions

Errors

FileDescriptor

Class Overview

Summary

Fields

public static final FileDescriptor err

public static final FileDescriptor in

public static final FileDescriptor out

Public Constructors

public FileDescriptor ()

Public Methods

public void sync ()

Throws

public String toString ()

Returns

public boolean valid ()