Package org.apache.commons.lang3

Class CharSequenceUtils

java.lang.Object

org.apache.commons.lang3.CharSequenceUtils

public class CharSequenceUtils
extends Object

Operations on CharSequence that are null safe.

Since:

3.0

See Also:

• CharSequence

Constructor Summary

Constructors

Constructor	Description
CharSequenceUtils()	Deprecated. TODO Make private in 4.0.

Method Summary

Modifier and Type	Method	Description
static CharSequence	subSequence(CharSequence cs, int start)	Returns a new CharSequence that is a subsequence of this sequence starting with the char value at the specified index.
static char[]	toCharArray(CharSequence source)	Converts the given CharSequence to a char[].

Methods inherited from class java.lang.Object

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

Constructor Details

CharSequenceUtils

@Deprecated
public CharSequenceUtils()

Deprecated.

TODO Make private in 4.0.

CharSequenceUtils instances should NOT be constructed in standard programming.

This constructor is public to permit tools that require a JavaBean instance to operate.

Method Details

subSequence

public static CharSequence subSequence(CharSequence cs,
 int start)

Returns a new CharSequence that is a subsequence of this sequence starting with the char value at the specified index.

This provides the CharSequence equivalent to String.substring(int). The length (in char) of the returned sequence is length() - start, so if start == end then an empty sequence is returned.

Parameters:

cs - the specified subsequence, null returns null

start - the start index, inclusive, valid

Returns:

a new subsequence, may be null

Throws:

IndexOutOfBoundsException - if start is negative or if start is greater than length()

toCharArray

public static char[] toCharArray(CharSequence source)

Converts the given CharSequence to a char[].

Parameters:

source - the CharSequence to be processed.

Returns:

the resulting char array, never null.

Since:

3.11