Skip to content

Most visited

Recently visited

navigation

FileWriter

public class FileWriter
extends OutputStreamWriter

java.lang.Object
   ↳ java.io.Writer
     ↳ java.io.OutputStreamWriter
       ↳ java.io.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 a FileOutputStream.

See also:

Summary

Inherited fields

From class java.io.Writer

Public constructors

FileWriter(String fileName)

Constructs a FileWriter object given a file name.

FileWriter(String fileName, boolean append)

Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

FileWriter(File file)

Constructs a FileWriter object given a File object.

FileWriter(File file, boolean append)

Constructs a FileWriter object given a File object.

FileWriter(FileDescriptor fd)

Constructs a FileWriter object associated with a file descriptor.

Inherited methods

From class java.io.OutputStreamWriter
From class java.io.Writer
From class java.lang.Object
From interface java.lang.Appendable
From interface java.io.Closeable
From interface java.io.Flushable
From interface java.lang.AutoCloseable

Public constructors

FileWriter

Added in API level 1
FileWriter (String fileName)

Constructs a FileWriter object given a file name.

Parameters
fileName String: 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

Added in API level 1
FileWriter (String fileName, 
                boolean append)

Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

Parameters
fileName String: String The system-dependent filename.
append boolean: 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

Added in API level 1
FileWriter (File file)

Constructs a FileWriter object given a File object.

Parameters
file File: a File object to write to.
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

Added in API level 1
FileWriter (File file, 
                boolean append)

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 File: a File object to write to
append boolean: 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

FileWriter

Added in API level 1
FileWriter (FileDescriptor fd)

Constructs a FileWriter object associated with a file descriptor.

Parameters
fd FileDescriptor: FileDescriptor object to write to.
This site uses cookies to store your preferences for site-specific language and display options.

Hooray!

This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.

Take a one-minute survey?
Help us improve Android tools and documentation.