java.io
public class FileOutputStream extends OutputStream
FileDescriptor.
| Constructor Summary | |
|---|---|
| FileOutputStream(String path, boolean append)
This method initializes a FileOutputStream object to write
to the named file. | |
| FileOutputStream(String path)
This method initializes a FileOutputStream object to write
to the named file. | |
| 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. | |
| Method Summary | |
|---|---|
| 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(int b)
This method writes a single byte of data to the file.
|
| 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.
|
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.
Parameters: path The name of the file this stream should write to append true to append bytes to the end of the file,
or false to write bytes to the beginning
Throws: SecurityException If write access to the file is not allowed FileNotFoundException If a non-security error occurs
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.
Parameters: path The name of the file this stream should write to
Throws: SecurityException If write access to the file is not allowed FileNotFoundException If a non-security error occurs
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.
Parameters: file The File object this stream should write to
Throws: SecurityException If write access to the file is not allowed FileNotFoundException If a non-security error occurs
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.
Parameters: file The File object this stream should write to append true to append bytes to the end of the file,
or false to write bytes to the beginning
Throws: SecurityException If write access to the file is not allowed FileNotFoundException If a non-security error occurs
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.
Parameters: fdObj The FileDescriptor this stream should write to
Throws: SecurityException If write access to the file is not allowed
Throws: IOException If an error occurs
FileDescriptor object representing
the file that is currently being written to
Returns: A FileDescriptor object for this stream
Throws: IOException If an error occurs
Parameters: b The byte of data to write, passed as an int
Throws: IOException If an error occurs
Parameters: buf The array of bytes to write to the file
Throws: IOException If an error occurs
len bytes from the byte array
buf to the file starting at index offset.
Parameters: buf The array of bytes to write to the file offset The offset into the array to start writing bytes from len The number of bytes to write to the file
Throws: IOException If an error occurs