FileWriter (Java 2 Platform SE 5.0) (original) (raw)

java.io

Class FileWriter

java.lang.Object extended by java.io.Writer java.io.OutputStreamWriter java.io.FileWriter

All Implemented Interfaces:

public class FileWriter

Convenience class for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.

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.

FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using aFileOutputStream.

Since:

JDK1.1

See Also:

OutputStreamWriter, FileOutputStream

Field Summary

Fields inherited from class java.io.Writer
lock

Constructor Summary
FileWriter(File file) Constructs a FileWriter object given a File object.
[FileWriter](../../java/io/FileWriter.html#FileWriter%28java.io.File, boolean%29)(File file, boolean append) Constructs a FileWriter object given a File object.
FileWriter(FileDescriptor fd) Constructs a FileWriter object associated with a file descriptor.
FileWriter(String fileName) Constructs a FileWriter object given a file name.
[FileWriter](../../java/io/FileWriter.html#FileWriter%28java.lang.String, boolean%29)(String fileName, boolean append) Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

Method Summary

Methods inherited from class java.io.OutputStreamWriter
close, flush, getEncoding, [write](../../java/io/OutputStreamWriter.html#write%28char[], int, int%29), write, [write](../../java/io/OutputStreamWriter.html#write%28java.lang.String, int, int%29)

Methods inherited from class java.io.Writer
append, append, [append](../../java/io/Writer.html#append%28java.lang.CharSequence, int, int%29), write, write

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../java/lang/Object.html#wait%28long, int%29)

Constructor Detail

FileWriter

public FileWriter(String fileName) throws IOException

Constructs a FileWriter object given a file name.

Parameters:

fileName - String The system-dependent filename.

Throws:

[IOException](../../java/io/IOException.html "class in java.io") - 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 object given a file name with a boolean indicating whether or not to append the data written.

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:

FileWriter

public FileWriter(File file) throws IOException

Constructs a FileWriter object given a File object.

Parameters:

file - a File object to write to.

Throws:

[IOException](../../java/io/IOException.html "class in java.io") - 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 object given a File object. If the second argument is true, then bytes will be written to the end of the file rather than the beginning.

Parameters:

file - a File object to write to

append - if true, then bytes will be written to the end of the file rather than the beginning

Throws:

Since:

1.4

FileWriter

public FileWriter(FileDescriptor fd)

Constructs a FileWriter object associated with a file descriptor.

Parameters:

fd - FileDescriptor object to write to.

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.