Package org.iqtig.packer.shared.error.crypto

Klasse StringUtils

java.lang.Object

org.iqtig.packer.shared.error.crypto.StringUtils

public class StringUtils
extends Object

Clone from org.apache.commons:commons-lang3:3.11.

Autor:

matthias.drummer

Feldübersicht

Felder

Modifizierer und Typ	Feld	Beschreibung
static final String	EMPTY	The empty String "".

Methodenübersicht

Modifizierer und Typ	Methode	Beschreibung
static String	defaultString(String str)	Returns either the passed in String, or if the String is null, an empty String ("").
static String	defaultString(String str, String defaultStr)	Returns either the passed in String, or if the String is null, the value of defaultStr.
static boolean	isBlank(CharSequence cs)	Checks if a CharSequence is empty (""), null or whitespace only.
static String	join(Iterable<?> iterable, String separator)	Joins the elements of the provided Iterable into a single String containing the provided elements.
static String	join(Object[] array, String separator)	Joins the elements of the provided array into a single String containing the provided list of elements.
static String	join(Object[] array, String separator, int startIndex, int endIndex)	Joins the elements of the provided array into a single String containing the provided list of elements.
static String	join(Iterator<?> iterator, String separator)	Joins the elements of the provided Iterator into a single String containing the provided elements.
static int	length(CharSequence cs)	Gets a CharSequence length or 0 if the CharSequence is null.

Von Klasse geerbte Methoden java.lang.Object

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

Felddetails

EMPTY

public static final String EMPTY

The empty String "".

Seit:

2.0

Siehe auch:

• Konstantenfeldwerte

Methodendetails

defaultString

public static String defaultString(String str)

Returns either the passed in String, or if the String is null, an empty String ("").

 StringUtils.defaultString(null)  = ""
 StringUtils.defaultString("")    = ""
 StringUtils.defaultString("bat") = "bat"
 

Parameter:

str - the String to check, may be null

Gibt zurück:

the passed in String, or the empty String if it was null

Siehe auch:

• String.valueOf(Object)

defaultString

public static String defaultString(String str,
 String defaultStr)

Returns either the passed in String, or if the String is null, the value of defaultStr.

 StringUtils.defaultString(null, "NULL")  = "NULL"
 StringUtils.defaultString("", "NULL")    = ""
 StringUtils.defaultString("bat", "NULL") = "bat"
 

Parameter:

str - the String to check, may be null

defaultStr - the default String to return if the input is null, may be null

Gibt zurück:

the passed in String, or the default if it was null

Siehe auch:

• String.valueOf(Object)

join

public static String join(Iterable<?> iterable,
 String separator)

Joins the elements of the provided Iterable into a single String containing the provided elements.

No delimiter is added before or after the list. A null separator is the same as an empty String ("").

See the examples here: join(Object[], String).

Parameter:

iterable - the Iterable providing the values to join together, may be null

separator - the separator character to use, null treated as ""

Gibt zurück:

the joined String, null if null iterator input

Seit:

2.3

join

public static String join(Iterator<?> iterator,
 String separator)

Joins the elements of the provided Iterator into a single String containing the provided elements.

No delimiter is added before or after the list. A null separator is the same as an empty String ("").

See the examples here: join(Object[], String).

Parameter:

iterator - the Iterator of values to join together, may be null

separator - the separator character to use, null treated as ""

Gibt zurück:

the joined String, null if null iterator input

join

public static String join(Object[] array,
 String separator)

Joins the elements of the provided array into a single String containing the provided list of elements.

No delimiter is added before or after the list. A null separator is the same as an empty String (""). Null objects or empty strings within the array are represented by empty strings.

 StringUtils.join(null, *)                = null
 StringUtils.join([], *)                  = ""
 StringUtils.join([null], *)              = ""
 StringUtils.join(["a", "b", "c"], "--")  = "a--b--c"
 StringUtils.join(["a", "b", "c"], null)  = "abc"
 StringUtils.join(["a", "b", "c"], "")    = "abc"
 StringUtils.join([null, "", "a"], ',')   = ",,a"
 

Parameter:

array - the array of values to join together, may be null

separator - the separator character to use, null treated as ""

Gibt zurück:

the joined String, null if null array input

join

public static String join(Object[] array,
 String separator,
 int startIndex,
 int endIndex)

Joins the elements of the provided array into a single String containing the provided list of elements.

No delimiter is added before or after the list. A null separator is the same as an empty String (""). Null objects or empty strings within the array are represented by empty strings.

 StringUtils.join(null, *, *, *)                = null
 StringUtils.join([], *, *, *)                  = ""
 StringUtils.join([null], *, *, *)              = ""
 StringUtils.join(["a", "b", "c"], "--", 0, 3)  = "a--b--c"
 StringUtils.join(["a", "b", "c"], "--", 1, 3)  = "b--c"
 StringUtils.join(["a", "b", "c"], "--", 2, 3)  = "c"
 StringUtils.join(["a", "b", "c"], "--", 2, 2)  = ""
 StringUtils.join(["a", "b", "c"], null, 0, 3)  = "abc"
 StringUtils.join(["a", "b", "c"], "", 0, 3)    = "abc"
 StringUtils.join([null, "", "a"], ',', 0, 3)   = ",,a"
 

Parameter:

array - the array of values to join together, may be null

separator - the separator character to use, null treated as ""

startIndex - the first index to start joining from.

endIndex - the index to stop joining from (exclusive).

Gibt zurück:

the joined String, null if null array input; or the empty string if endIndex - startIndex <= 0. The number of joined entries is given by endIndex - startIndex

Löst aus:

ArrayIndexOutOfBoundsException - ife
startIndex < 0 or
startIndex >= array.length() or
endIndex < 0 or
endIndex > array.length()

isBlank

public static boolean isBlank(CharSequence cs)

Checks if a CharSequence is empty (""), null or whitespace only.

Whitespace is defined by Character.isWhitespace(char).

 StringUtils.isBlank(null)      = true
 StringUtils.isBlank("")        = true
 StringUtils.isBlank(" ")       = true
 StringUtils.isBlank("bob")     = false
 StringUtils.isBlank("  bob  ") = false
 

Parameter:

cs - the CharSequence to check, may be null

Gibt zurück:

true if the CharSequence is null, empty or whitespace only

Seit:

2.0, 3.0 Changed signature from isBlank(String) to isBlank(CharSequence)

length

public static int length(CharSequence cs)

Gets a CharSequence length or 0 if the CharSequence is null.

Parameter:

cs - a CharSequence or null

Gibt zurück:

CharSequence length or 0 if the CharSequence is null.

Seit:

2.4, 3.0 Changed signature from length(String) to length(CharSequence)