hera.util

Class StringUtils

java.lang.Object

hera.util.StringUtils

public class StringUtils
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	EMPTY_STRING
static java.lang.String	NULL_STRING

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Modifier and Type	Method and Description
static int	countMatches(java.lang.String str, char ch) Return count of matching character in str.
static boolean	hasLength(java.lang.CharSequence str) Return true if str is neither null nor empty.
static boolean	hasText(java.lang.CharSequence str) Check whether str is a meaningful string or not.
static boolean	isEmpty(java.lang.CharSequence str) Return true if str is either null or meaningless string.
static java.lang.String	join(java.lang.Iterable<?> values, java.lang.String token) Concat values to token.
static java.lang.String	join(java.lang.Object[] values, java.lang.String token) Concat values to token.
static int	length(java.lang.CharSequence str) Get length of str.
static java.lang.String	ltrim(java.lang.String str) Remove space in left of the str.
static void	multiply(java.lang.StringBuilder buffer, java.lang.String word, int repeat) Make a string by repeating symbol n times.
static java.lang.String	multiply(java.lang.String word, int repeat) Make a string by repeating symbol n times.
static java.lang.String	nvl(java.lang.String... strs) Return an non-null string by inspecting array strs.
static java.lang.String	removePrefix(java.lang.String str, java.lang.String prefix) Remove prefix if exists.
static java.lang.String	removeSuffix(java.lang.String str, java.lang.String suffix) Remove suffix if exists.
static java.lang.String	repeat(java.lang.String word, int repeat) Alias of multiply(String, int).
static java.lang.String	rtrim(java.lang.String str) Remove space in right of the str.
static java.util.List<java.lang.String>	split(java.lang.String string, java.lang.String delimiter) Split string with a delimiter.
static java.lang.String	split(java.lang.String string, java.lang.String delimiter, int index) Split string with a delimiter and return index-th string.
static java.lang.String	trim(java.lang.String str) Remove space on both sides of str.
static java.lang.String	uncapitalize(java.lang.String str) Set 1st character to lower case.

Methods inherited from class java.lang.Object

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

Field Detail

NULL_STRING

public static final java.lang.String NULL_STRING

See Also:

Constant Field Values

EMPTY_STRING

public static final java.lang.String EMPTY_STRING

See Also:

Constant Field Values

Constructor Detail

StringUtils

public StringUtils()

Method Detail

isEmpty

public static boolean isEmpty(java.lang.CharSequence str)

Return true if str is either null or meaningless string. Otherwise return false.

Parameters:

str - string to inspect

Returns:

whether a string is meaningless or not

See Also:

hasText(CharSequence)

length

public static int length(java.lang.CharSequence str)

Get length of str. If str is null, then return 0.

Parameters:

str - string to get length

Returns:

a length of str

hasLength

public static boolean hasLength(java.lang.CharSequence str)

Return true if str is neither null nor empty. Otherwise, return false.

Parameters:

str - string to inspect

Returns:

whether string has a length or not

hasText

public static boolean hasText(java.lang.CharSequence str)

Check whether str is a meaningful string or not.

Parameters:

str - string to inspect

Returns:

whether str is meanful or not

See Also:

isEmpty(CharSequence)

nvl

public static java.lang.String nvl(java.lang.String... strs)

Return an non-null string by inspecting array strs. If strs is null, return empty string "".

Parameters:

strs - variable argument of string

Returns:

converted string

split

public static java.util.List<java.lang.String> split(java.lang.String string,
                                                     java.lang.String delimiter)

Split string with a delimiter.

Parameters:

string - string to split

delimiter - a delimiter

Returns:

list of string splitted by a delimiter

split

public static java.lang.String split(java.lang.String string,
                                     java.lang.String delimiter,
                                     int index)

Split string with a delimiter and return index-th string.

Parameters:

string - string to split

delimiter - a delimiter

index - string index

Returns:

index-th string splitted by a delimiter

ltrim

public static java.lang.String ltrim(java.lang.String str)

Remove space in left of the str.

Parameters:

str - target string

Returns:

string with left space removed

rtrim

public static java.lang.String rtrim(java.lang.String str)

Remove space in right of the str.

Parameters:

str - target string

Returns:

string with right space removed

trim

public static java.lang.String trim(java.lang.String str)

Remove space on both sides of str.

Parameters:

str - target string

Returns:

string with both sides of space removed

join

public static java.lang.String join(java.lang.Iterable<?> values,
                                    java.lang.String token)

Concat values to token. If values is empty, return an empty string.

Parameters:

values - Iterable which contain strings

token - concat target

Returns:

concatted string

join

public static java.lang.String join(java.lang.Object[] values,
                                    java.lang.String token)

Concat values to token. If values is empty, return an empty string.

Parameters:

values - Object which contain strings

token - concat target

Returns:

concatenated string

multiply

public static java.lang.String multiply(java.lang.String word,
                                        int repeat)

Make a string by repeating symbol n times.

Parameters:

word - word to repeat

repeat - repeat times

Returns:

generated string

multiply

public static void multiply(java.lang.StringBuilder buffer,
                            java.lang.String word,
                            int repeat)

Make a string by repeating symbol n times.

Parameters:

buffer - StringBuilder to append word

word - word to repeat

repeat - repeat times

repeat

public static java.lang.String repeat(java.lang.String word,
                                      int repeat)

Alias of multiply(String, int).

Parameters:

word - word to repeat

repeat - repeat times

Returns:

generated string

See Also:

multiply(String, int)

uncapitalize

public static java.lang.String uncapitalize(java.lang.String str)

Set 1st character to lower case.

Parameters:

str - target string

Returns:

string with 1st character in lower case

countMatches

public static int countMatches(java.lang.String str,
                               char ch)

Return count of matching character in str.

Parameters:

str - target string

ch - character to match

Returns:

matching count

removePrefix

public static java.lang.String removePrefix(java.lang.String str,
                                            java.lang.String prefix)

Remove prefix if exists.

Parameters:

str - string to remove

prefix - prefix to remove

Returns:

removed string

removeSuffix

public static java.lang.String removeSuffix(java.lang.String str,
                                            java.lang.String suffix)

Remove suffix if exists.

Parameters:

str - string to remove

suffix - suffix to remove

Returns:

removed string