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:
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
| |
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 (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 (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 (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 (FileDescriptor fd)
Constructs a FileWriter object associated with a file descriptor.
| Parameters | |
|---|---|
fd |
FileDescriptor:
FileDescriptor object to write to.
|
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