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

Writes text to character files using a default buffer size. Encoding from characters to bytes uses either a specified charset or the platform's default charset.

Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileWriter (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open.

The FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using a FileOutputStream.

Since:: 1.1
See Also:: OutputStreamWriter, FileOutputStream

Field Summary

Fields declared in class java.io.Writer

lock

Constructor Summary

Constructors
Constructor	Description
`FileWriter(File file)`	Constructs a `FileWriter` given the `File` to write, using the platform's default charset
`FileWriter(FileDescriptor fd)`	Constructs a `FileWriter` given a file descriptor, using the platform's default charset.
`FileWriter(File file, boolean append)`	Constructs a `FileWriter` given the `File` to write and a boolean indicating whether to append the data written, using the platform's default charset.
`FileWriter(File file, Charset charset)`	Constructs a `FileWriter` given the `File` to write and charset.
`FileWriter(File file, Charset charset, boolean append)`	Constructs a `FileWriter` given the `File` to write, charset and a boolean indicating whether to append the data written.
`FileWriter(String fileName)`	Constructs a `FileWriter` given a file name, using the platform's default charset
`FileWriter(String fileName, boolean append)`	Constructs a `FileWriter` given a file name and a boolean indicating whether to append the data written, using the platform's default charset.
`FileWriter(String fileName, Charset charset)`	Constructs a `FileWriter` given a file name and charset.
`FileWriter(String fileName, Charset charset, boolean append)`	Constructs a `FileWriter` given a file name, charset and a boolean indicating whether to append the data written.

Method Summary

Methods declared in class java.io.OutputStreamWriter

flush, getEncoding, write, write, write

Methods declared in class java.io.Writer

append, append, append, close, nullWriter, write, write

Methods declared in class java.lang.Object

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

Constructor Detail

FileWriter

public FileWriter(String fileName)
           throws IOException

Constructs a FileWriter given a file name, using the platform's default charset

Parameters:: fileName - String The system-dependent filename.
Throws:: IOException - if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

FileWriter

public FileWriter(String fileName,
                  boolean append)
           throws IOException

Constructs a FileWriter given a file name and a boolean indicating whether to append the data written, using the platform's default charset.

Parameters:: fileName - String The system-dependent filename.; append - boolean if true, then data will be written to the end of the file rather than the beginning.
Throws:: IOException - if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

FileWriter

public FileWriter(File file)
           throws IOException

Constructs a FileWriter given the File to write, using the platform's default charset

Parameters:: file - the File to write.
Throws:: IOException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

FileWriter

public FileWriter(File file,
                  boolean append)
           throws IOException

Constructs a FileWriter given the File to write and a boolean indicating whether to append the data written, using the platform's default charset.

Parameters:: file - the File to write; append - if true, then bytes will be written to the end of the file rather than the beginning
Throws:: IOException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:: 1.4

FileWriter

public FileWriter(FileDescriptor fd)

Constructs a FileWriter given a file descriptor, using the platform's default charset.

Parameters:: fd - the FileDescriptor to write.

FileWriter

public FileWriter(String fileName,
                  Charset charset)
           throws IOException

Constructs a FileWriter given a file name and charset.

Parameters:: fileName - the name of the file to write; charset - the charset
Throws:: IOException - if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:: 11

FileWriter

public FileWriter(String fileName,
                  Charset charset,
                  boolean append)
           throws IOException

Constructs a FileWriter given a file name, charset and a boolean indicating whether to append the data written.

Parameters:: fileName - the name of the file to write; charset - the charset; append - a boolean. If true, the writer will write the data to the end of the file rather than the beginning.
Throws:: IOException - if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:: 11

FileWriter

public FileWriter(File file,
                  Charset charset)
           throws IOException

Constructs a FileWriter given the File to write and charset.

Parameters:: file - the File to write; charset - the charset
Throws:: IOException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:: 11

FileWriter

public FileWriter(File file,
                  Charset charset,
                  boolean append)
           throws IOException

Constructs a FileWriter given the File to write, charset and a boolean indicating whether to append the data written.

Parameters:: file - the File to write; charset - the charset; append - a boolean. If true, the writer will write the data to the end of the file rather than the beginning.
Throws:: IOException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason
Since:: 11