Package org.apache.commons.io.output

Class NullAppendable

java.lang.Object

org.apache.commons.io.output.NullAppendable

All Implemented Interfaces:

java.lang.Appendable

public class NullAppendable
extends java.lang.Object
implements java.lang.Appendable

Appends all data to the famous /dev/null.

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

Since:

2.8.0

Field Summary

Fields

Modifier and Type	Field	Description
static NullAppendable	INSTANCE	A singleton.

Method Summary

Modifier and Type	Method	Description
java.lang.Appendable	append(char c)
java.lang.Appendable	append(java.lang.CharSequence csq)
java.lang.Appendable	append(java.lang.CharSequence csq, int start, int end)	Does nothing except argument validation, like writing to /dev/null.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final NullAppendable INSTANCE

A singleton.

Method Detail

append

public java.lang.Appendable append(char c)
                            throws java.io.IOException

Specified by:

append in interface java.lang.Appendable

Throws:

java.io.IOException

append

public java.lang.Appendable append(java.lang.CharSequence csq)
                            throws java.io.IOException

Specified by:

append in interface java.lang.Appendable

Throws:

java.io.IOException

append

public java.lang.Appendable append(java.lang.CharSequence csq,
                                   int start,
                                   int end)
                            throws java.io.IOException

Does nothing except argument validation, like writing to /dev/null.

Specified by:

append in interface java.lang.Appendable

Parameters:

csq - The character sequence from which a subsequence will be appended. If csq is null, it is treated as if it were "null".

start - The index of the first character in the subsequence.

end - The index of the character following the last character in the subsequence.

Returns:

this instance.

Throws:

java.lang.IndexOutOfBoundsException - If start or end are negative, end is greater than csq.length(), or start is greater than end.

java.io.IOException