public class StringUtils extends Object
Modifier and Type | Method and Description |
---|---|
static String |
arrayToString(Object[] array,
String separator)
Converts an array of objects to a string.
|
static String |
coalesce(String preferred,
String alternative)
Returns the preferred String if it is not empty
ot the alternative String otherwise.
|
static boolean |
compareEqual(String s1,
String s2,
boolean ignoreCase)
Compares two Strings with each other - either with or without character case.
|
static boolean |
isCharBetween(char c,
char beg,
char end)
returns true if the character c is between the characters beg and end
|
static boolean |
isEmpty(String s)
Checks if a string is empty
|
static boolean |
isLower(char c)
returns true if the character c is an upper case character ('a'-'z')
|
static boolean |
isLower(String s,
int count)
returns true if the first count characters of s are all lower case (or other non-case sensitive characters)
|
static boolean |
isNotEmpty(String s)
Checks if a string is not null or empty
|
static boolean |
isNumber(char c)
returns true if the character c is a number digit ('0'-'9')
|
static boolean |
isNumber(String s)
returns true if the string s is a number (contains only the characters 0 to 9)
|
static boolean |
isNumeric(char c,
boolean decimal)
returns true if the character c is a numeric digit ('+' || '-' || '.' || ',' || '0'-'9')
|
static boolean |
isNumeric(String s,
boolean decimal)
returns true if the string s contains only numeric digits ('+' || '-' || '.' || ',' || '0'-'9')
|
static boolean |
isUpper(char c)
returns true if the character c is an upper case character ('A'-'Z')
|
static boolean |
isUpper(String s,
int count)
returns true if the first count characters of s are all upper case (or other non-case sensitive characters)
|
static boolean |
isValid(String s)
Deprecated.
this has been renamed to isNotEmpty
|
static String |
nullIfEmpty(Object value)
Returns null if the value supplied is null or an empty String.
|
static String |
remove(String s,
char c)
Removes all occurrences of c from s
|
static String |
remove(String s,
String remove)
Removes all occurrences of remove from s
|
static String |
removeBlanks(String s)
removes all blanks from s
|
static String |
replace(String source,
String find,
String replace)
Replaces all occurrences of find in source by replace.
|
static String |
replaceAll(String s,
String find,
String replace)
Returns a String with all occurrences of
from within orig replaced with to . |
static String |
toLower(String s,
int count)
makes the first n characters of s lower case
|
static String |
toString(Object value)
Converts a value to a string.
|
static String |
toString(Object[] array)
Converts an array of objects to a string.
|
static String |
toString(Object[] array,
String defValue)
Converts an array of objects to a string.
|
static String |
toString(Object value,
String defValue)
Converts a value to a string.
|
static String |
toUpper(String s,
int count)
makes the first n characters of s upper case
|
static String |
validate(String s)
Validates a given string.
|
static String |
valueOf(Object value)
Converts a value to a string.
|
static String |
valueOf(Object[] array)
Converts an objects to a string.
|
public static String toString(Object value, String defValue)
value
- the value to convertdefValue
- default value which to return if value is nullpublic static String toString(Object value)
value
- the value to convertpublic static String toString(Object[] array, String defValue)
array
- array of objectsdefValue
- default value which to return if array is nullpublic static String toString(Object[] array)
array
- array of objectspublic static String valueOf(Object value)
value
- the value to convertpublic static String valueOf(Object[] array)
array
- array of objectspublic static String coalesce(String preferred, String alternative)
preferred
- the preferred Stringalternative
- the alternative String if the preferred String is not validpublic static String nullIfEmpty(Object value)
value
- the value to checkpublic static String arrayToString(Object[] array, String separator)
array
- array of objectsseparator
- the separator to put between the object stringspublic static boolean isEmpty(String s)
s
- the String to checknull
@Deprecated public static boolean isValid(String s)
s
- the string to validatepublic static boolean isNotEmpty(String s)
s
- the string to validatepublic static boolean compareEqual(String s1, String s2, boolean ignoreCase)
s1
- the first Strings2
- the second StringignoreCase
- whether to ignore the character casing or notpublic static String validate(String s)
s
- the string to validatepublic static String replace(String source, String find, String replace)
source
- the original String.find
- the String to be replacedreplace
- the replacement stringfind
in source
replaced by replace
public static String replaceAll(String s, String find, String replace)
from
within orig
replaced with to
.
If orig
contains no occurrences of from
, or if from
is equal to
to
,orig
itself is returned rather than a copy being made. If orig is null
,
null
is returned.s
- the original String.find
- the String to be replacedreplace
- the replacement stringfind
in source
replaced by replace
public static String remove(String s, String remove)
s
- the source stringremove
- the string to removepublic static String remove(String s, char c)
s
- the source stringc
- the character to removepublic static String removeBlanks(String s)
s
- the source stringpublic static boolean isCharBetween(char c, char beg, char end)
c
- the source characterbeg
- the lower end characterend
- the higher end characterpublic static boolean isNumber(char c)
c
- the source characterpublic static boolean isNumber(String s)
s
- the source stringpublic static boolean isNumeric(char c, boolean decimal)
c
- the source characterdecimal
- flag to indicate whether the decimal and grouping separators ('.' || ',') are allowedpublic static boolean isNumeric(String s, boolean decimal)
s
- the source stringdecimal
- flag to indicate whether the decimal and grouping separators ('.' || ',') are allowedpublic static boolean isUpper(char c)
c
- the characterpublic static boolean isUpper(String s, int count)
s
- the source stringpublic static boolean isLower(char c)
c
- the characterpublic static boolean isLower(String s, int count)
s
- the source stringpublic static String toUpper(String s, int count)
s
- the source stringcount
- the number of characters to convertCopyright © 2008–2018 Apache Software Foundation. All rights reserved.