FileWriter

Class Overview

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.

Summary

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Inherited Fields

From class java.io.Writer

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

Public Constructors

FileWriter ( File file)

Creates a FileWriter using the File


           file

FileWriter ( File file, boolean append)

Creates a FileWriter using the File


           file

FileWriter ( FileDescriptor fd)

Creates a FileWriter using the existing FileDescriptor

fd

FileWriter ( String filename)

Creates a FileWriter using the platform dependent


           filename

FileWriter ( String filename, boolean append)

Creates a FileWriter using the platform dependent


           filename

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Inherited Methods

From class java.io.OutputStreamWriter

void	close () Closes this writer.
void	flush () Flushes this writer.
String	getEncoding () Returns the canonical name of the encoding used by this writer to convert characters to bytes, or null if this writer has been closed.
void	write (char[] buffer, int offset, int count) Writes `count` characters starting at `offset` in `buf` to this writer.
void	write ( String str, int offset, int count) Writes `count` characters starting at `offset` in `str` to this writer.
void	write (int oneChar) Writes the character `oneChar` to this writer.

From class java.io.Writer

Writer	append ( CharSequence csq) Appends the character sequence `csq` to the target.
Writer	append ( CharSequence csq, int start, int end) Appends a subsequence of the character sequence `csq` to the target.
Writer	append (char c) Appends the character `c` to the target.
abstract void	close () Closes this writer.
abstract void	flush () Flushes this writer.
void	write (char[] buf) Writes the entire character buffer `buf` to the target.
void	write ( String str) Writes the characters from the specified string to the target.
abstract void	write (char[] buf, int offset, int count) Writes `count` characters starting at `offset` in `buf` to the target.
void	write ( String str, int offset, int count) Writes `count` characters from `str` starting at `offset` to the target.
void	write (int oneChar) Writes one character to the target.

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.

From interface java.io.Closeable

From interface java.io.Flushable

From interface java.lang.Appendable

From interface java.lang.AutoCloseable

Public Constructors

public FileWriter ( File file)

Added in API level 1

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.

public FileWriter ( File file, boolean append)

Added in API level 1

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.

public FileWriter ( FileDescriptor fd)

Added in API level 1

Creates a FileWriter using the existing FileDescriptor fd .

Parameters

fd	the non-null FileDescriptor to write bytes to.

public FileWriter ( String filename)

Added in API level 1

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.

public FileWriter ( String filename, boolean append)

Added in API level 1

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.

java.lang.Object
↳	java.io.Writer
	↳	java.io.OutputStreamWriter
		↳	java.io.FileWriter

Results

Interfaces

Classes

Exceptions

Errors

Class Overview

See Also

Summary

Public Constructors

public FileWriter ( File file)

Parameters

Throws

public FileWriter ( File file, boolean append)

Parameters

Throws

public FileWriter ( FileDescriptor fd)

Parameters

public FileWriter ( String filename)

Parameters

Throws

public FileWriter ( String filename, boolean append)

Parameters

Throws