Package org.apache.commons.io.output

Class NullWriter

java.lang.Object

java.io.Writer

org.apache.commons.io.output.NullWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class NullWriter
extends Writer

This Writer writes all data to the famous /dev/null.

This Writer has no destination (file/socket etc.) and all characters written to it are ignored and lost.

Version:

$Id: NullWriter.java 1304052 2012-03-22 20:55:29Z ggregory $

Field Summary

Fields

Modifier and Type	Field	Description
static NullWriter	NULL_WRITER	A singleton.

Fields inherited from class java.io.Writer

lock

Constructor Summary

Constructors

Constructor	Description
NullWriter()	Constructs a new NullWriter.

Method Summary

Modifier and Type	Method	Description
Writer	append(char c)	Does nothing - output to /dev/null.
Writer	append(CharSequence csq)	Does nothing - output to /dev/null.
Writer	append(CharSequence csq, int start, int end)	Does nothing - output to /dev/null.
void	close()
void	flush()
void	write(char[] chr)	Does nothing - output to /dev/null.
void	write(char[] chr, int st, int end)	Does nothing - output to /dev/null.
void	write(int idx)	Does nothing - output to /dev/null.
void	write(String str)	Does nothing - output to /dev/null.
void	write(String str, int st, int end)	Does nothing - output to /dev/null.

Methods inherited from class java.lang.Object

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

Field Detail

NULL_WRITER

public static final NullWriter NULL_WRITER

A singleton.

Constructor Detail

NullWriter

public NullWriter()

Constructs a new NullWriter.

Method Detail

append

public Writer append(char c)

Does nothing - output to /dev/null.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

c - The character to write

Returns:

this writer

Since:

2.0

append

public Writer append(CharSequence csq,
                     int start,
                     int end)

Does nothing - output to /dev/null.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

csq - The character sequence to write

start - The index of the first character to write

end - The index of the first character to write (exclusive)

Returns:

this writer

Since:

2.0

append

public Writer append(CharSequence csq)

Does nothing - output to /dev/null.

Specified by:

append in interface Appendable

Overrides:

append in class Writer

Parameters:

csq - The character sequence to write

Returns:

this writer

Since:

2.0

write

public void write(int idx)

Does nothing - output to /dev/null.

Overrides:

write in class Writer

Parameters:

idx - The character to write

write

public void write(char[] chr)

Does nothing - output to /dev/null.

Overrides:

write in class Writer

Parameters:

chr - The characters to write

write

public void write(char[] chr,
                  int st,
                  int end)

Does nothing - output to /dev/null.

Specified by:

write in class Writer

Parameters:

chr - The characters to write

st - The start offset

end - The number of characters to write

write

public void write(String str)

Does nothing - output to /dev/null.

Overrides:

write in class Writer

Parameters:

str - The string to write

write

public void write(String str,
                  int st,
                  int end)

Does nothing - output to /dev/null.

Overrides:

write in class Writer

Parameters:

str - The string to write

st - The start offset

end - The number of characters to write

flush

public void flush()

Specified by:

flush in interface Flushable

Specified by:

flush in class Writer

See Also:

Writer.flush()

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class Writer

See Also:

Writer.close()