Package java.io

Class FileWriter

java.lang.Object

java.io.Writer

java.io.OutputStreamWriter

java.io.FileWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class FileWriter
extends OutputStreamWriter

A specialized Writer that writes to a file in the file system. All write requests made by calling methods in this class are directly forwarded to the equivalent function of the underlying operating system. Since this may induce some performance penalty, in particular if many small write requests are made, a FileWriter is often wrapped by a BufferedWriter.

See Also:

BufferedWriter, FileReader

Field Summary

Fields inherited from class java.io.Writer

lock

Constructor Summary

Constructors

Constructor	Description
FileWriter(File file)	Creates a FileWriter using the File file.
FileWriter(FileDescriptor fd)	Creates a FileWriter using the existing FileDescriptor fd.
FileWriter(File file, boolean append)	Creates a FileWriter using the File file.
FileWriter(String filename)	Creates a FileWriter using the platform dependent filename.
FileWriter(String filename, boolean append)	Creates a FileWriter using the platform dependent filename.

Method Summary

Methods inherited from class java.io.OutputStreamWriter

close, flush, getEncoding, write, write, write

Methods inherited from class java.io.Writer

append, append, append, write, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileWriter

public FileWriter(File file)
           throws IOException

Creates a FileWriter using the File file.

Parameters:

file - the non-null File to write bytes to.

Throws:

IOException - if file cannot be opened for writing.

FileWriter

public FileWriter(File file,
                  boolean append)
           throws IOException

Creates a FileWriter using the File file. The parameter append determines whether or not the file is opened and appended to or just opened and overwritten.

Parameters:

file - the non-null File to write bytes to.

append - indicates whether or not to append to an existing file.

Throws:

IOException - if the file cannot be opened for writing.

FileWriter

public FileWriter(FileDescriptor fd)

Creates a FileWriter using the existing FileDescriptor fd.

Parameters:

fd - the non-null FileDescriptor to write bytes to.

FileWriter

public FileWriter(String filename)
           throws IOException

Creates a FileWriter using the platform dependent filename.

Parameters:

filename - the non-null name of the file to write bytes to.

Throws:

IOException - if the file cannot be opened for writing.

FileWriter

public FileWriter(String filename,
                  boolean append)
           throws IOException

Creates a FileWriter using the platform dependent filename. The parameter append determines whether or not the file is opened and appended to or just opened and overwritten.

Parameters:

filename - the non-null name of the file to write bytes to.

append - indicates whether or not to append to an existing file.

Throws:

IOException - if the file cannot be opened for writing.