Package java.io

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Class FileDescriptor

public  final  class  java.io.FileDescriptor
    extends  java.lang.Object  
{
        // Fields
    public final static FileDescriptor err;	
    public final static FileDescriptor in;	
    public final static FileDescriptor out;	

       // Constructors
    public FileDescriptor();	

        // Methods
    public boolean valid();	
}

Instances of the file descriptor class serve as an opaque handle to the underlying machine- specific structure representing an open file or an open socket.

Applications should not create their own file descriptors.

Fields

err

public final static FileDescriptor err 

A handle to the standard error stream.

in

public final static FileDescriptor in 

A handle to the standard input stream.

out

public final static FileDescriptor out 

A handle to the standard output stream.

Constructors

FileDescriptor

public FileDescriptor() 

The default constructor.

Methods

valid

public boolean valid() 

Return Value:

Returns true if the file descriptor object represents a valid, open file or socket; false otherwise.