java.io
Class FileOutputStream
- Closeable, Flushable
This classes allows a stream of data to be written to a disk file or
any open FileDescriptor.
FileOutputStream(File file)- This method initializes a
FileOutputStream object to write
to the specified File object.
|
FileOutputStream(File file, boolean append)- This method initializes a
FileOutputStream object to write
to the specified File object.
|
FileOutputStream(FileDescriptor fdObj)- This method initializes a
FileOutputStream object to write
to the file represented by the specified FileDescriptor
object.
|
FileOutputStream(String path)- This method initializes a
FileOutputStream object to write
to the named file.
|
FileOutputStream(String path, boolean append)- This method initializes a
FileOutputStream object to write
to the named file.
|
void | close()- This method closes the underlying file.
|
protected void | finalize()
|
FileChannel | getChannel()- This method creates a java.nio.channels.FileChannel.
|
FileDescriptor | getFD()- This method returns a
FileDescriptor object representing
the file that is currently being written to
|
void | write(byte[] buf)- This method writes all the bytes in the specified array to the
file.
|
void | write(byte[] buf, int offset, int len)- This method writes
len bytes from the byte array
buf to the file starting at index offset.
|
void | write(int b)- This method writes a single byte of data to the file.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
FileOutputStream
public FileOutputStream(File file)
throws SecurityException,
FileNotFoundException This method initializes a
FileOutputStream object to write
to the specified
File object. The file is created if it
does not exist, and the bytes written are written starting at the
beginning of the file.
Before opening a file, a security check is performed by calling the
checkWrite method of the
SecurityManager (if
one exists) with the name of the file to be opened. An exception is
thrown if writing is not allowed.
file - The File object this stream should write to
FileOutputStream
public FileOutputStream(File file,
boolean append)
throws FileNotFoundException This method initializes a
FileOutputStream object to write
to the specified
File object. The file is created if it
does not exist, and the bytes written are written starting at the
beginning of the file if the
append parameter is
false. Otherwise bytes are written at the end of the
file.
Before opening a file, a security check is performed by calling the
checkWrite method of the
SecurityManager (if
one exists) with the name of the file to be opened. An exception is
thrown if writing is not allowed.
file - The File object this stream should write toappend - true to append bytes to the end of the file,
or false to write bytes to the beginning
FileOutputStream
public FileOutputStream(FileDescriptor fdObj)
throws SecurityException This method initializes a
FileOutputStream object to write
to the file represented by the specified
FileDescriptor
object. This method does not create any underlying disk file or
reposition the file pointer of the given descriptor. It assumes that
this descriptor is ready for writing as is.
Before opening a file, a security check is performed by calling the
checkWrite method of the
SecurityManager (if
one exists) with the specified
FileDescriptor as an argument.
An exception is thrown if writing is not allowed.
fdObj - The FileDescriptor this stream should write to
FileOutputStream
public FileOutputStream(String path)
throws SecurityException,
FileNotFoundException This method initializes a
FileOutputStream object to write
to the named file. The file is created if it does not exist, and
the bytes written are written starting at the beginning of the file.
Before opening a file, a security check is performed by calling the
checkWrite method of the
SecurityManager (if
one exists) with the name of the file to be opened. An exception is
thrown if writing is not allowed.
path - The name of the file this stream should write to
FileOutputStream
public FileOutputStream(String path,
boolean append)
throws SecurityException,
FileNotFoundException This method initializes a
FileOutputStream object to write
to the named file. The file is created if it does not exist, and
the bytes written are written starting at the beginning of the file if
the
append argument is
false or at the end
of the file if the
append argument is true.
Before opening a file, a security check is performed by calling the
checkWrite method of the
SecurityManager (if
one exists) with the name of the file to be opened. An exception is
thrown if writing is not allowed.
path - The name of the file this stream should write toappend - true to append bytes to the end of the file,
or false to write bytes to the beginning
close
public void close()
throws IOException This method closes the underlying file. Any further attempts to
write to this stream will likely generate an exception since the
file is closed.
- close in interface Closeable
- close in interface OutputStream
getChannel
public FileChannel getChannel()
This method creates a java.nio.channels.FileChannel.
Nio does not allow one to create a file channel directly.
A file channel must be created by first creating an instance of
Input/Output/RandomAccessFile and invoking the getChannel() method on it.
getFD
public final FileDescriptor getFD()
throws IOException This method returns a FileDescriptor object representing
the file that is currently being written to
- A
FileDescriptor object for this stream
write
public void write(byte[] buf)
throws IOException This method writes all the bytes in the specified array to the
file.
- write in interface OutputStream
buf - The array of bytes to write to the file
write
public void write(byte[] buf,
int offset,
int len)
throws IOException This method writes len bytes from the byte array
buf to the file starting at index offset.
- write in interface OutputStream
buf - The array of bytes to write to the fileoffset - The offset into the array to start writing bytes fromlen - The number of bytes to write to the file
write
public void write(int b)
throws IOException This method writes a single byte of data to the file.
- write in interface OutputStream
b - The byte of data to write, passed as an int
FileOutputStream.java -- Writes to a file on disk.
Copyright (C) 1998, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GNU Classpath.
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it under the terms of the GNU General Public License as published by
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