cn.com.pism.frc.resourcescanner.utils

类 StringUtils

java.lang.Object

cn.com.pism.frc.resourcescanner.utils.StringUtils

public class StringUtils
extends Object

Various string-related utilities.

方法概要

限定符和类型	方法和说明
static String	arrayToCommaDelimitedString(Object[] strings) Turns this string array in one comma-delimited string.
static String	arrayToDelimitedString(String delimiter, Object[] strings) Turns this string array in one delimited string.
static String	collapseWhitespace(String str) Replaces all sequences of whitespace by a single blank.
static String	collectionToCommaDelimitedString(Collection<?> collection) Convenience method to return a Collection as a comma-delimited String.
static String	collectionToDelimitedString(Collection<?> collection, String delimiter) Convenience method to return a Collection as a delimited String.
static int	countOccurrencesOf(String str, String token) Counts the number of occurrences of this token in this string.
static boolean	hasLength(String str) Checks whether this string is not null and not empty.
static boolean	hasText(String s) Checks whether this string isn't null and contains at least one non-blank character.
static boolean	isCharAnyOf(char c, String chars) Checks whether this characters matches any of these characters.
static String	left(String str, int count) Returns the first n characters from this string, where n = count.
static String	leftPad(String original, int length, char padChar)
static String	replace(String inString, String oldPattern, String newPattern) Replace all occurences of a substring within a string with another string.
static String	replaceAll(String str, String originalToken, String replacementToken) Replaces all occurrances of this originalToken in this string with this replacementToken.
static boolean	startsAndEndsWith(String str, String prefix, String... suffixes) Checks whether this strings both begins with this prefix and ends withs either of these suffixes.
static String[]	tokenizeToStringArray(String str, String delimiters) Splits this string into an array using these delimiters.
static List<String>	tokenizeToStringCollection(String str, char delimiterChar, char groupDelimiterChar) Splits this string into a collection using this delimiter and this group delimiter.
static List<String>	tokenizeToStringCollection(String str, String delimiters) Splits this string into a collection using these delimiters.
static String	trimLeadingCharacter(String str, char character) Trim any leading occurrence of this character from the given String.
static String	trimLeadingWhitespace(String str) Trim leading whitespace from the given String.
static String	trimLineBreak(String str) Trim the trailing linebreak (if any) from this string.
static String	trimOrLeftPad(String str, int length, char padChar) Trims or pads this string, so it has this exact length.
static String	trimOrPad(String str, int length) Trims or pads (with spaces) this string, so it has this exact length.
static String	trimOrPad(String str, int length, char padChar) Trims or pads this string, so it has this exact length.
static String	trimTrailingWhitespace(String str) Trim trailing whitespace from the given String.
static String	wordWrap(String str, int lineSize) Wrap this string at the word boundary at or below lineSize characters.
static String	wrap(String str, int lineSize) Wrap this string every lineSize characters.

从类继承的方法 java.lang.Object

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

方法详细资料

trimOrPad

public static String trimOrPad(String str,
                               int length)

Trims or pads (with spaces) this string, so it has this exact length.

参数:

str - The string to adjust. null is treated as an empty string.

length - The exact length to reach.

返回:

The adjusted string.

trimOrPad

public static String trimOrPad(String str,
                               int length,
                               char padChar)

Trims or pads this string, so it has this exact length.

参数:

str - The string to adjust. null is treated as an empty string.

length - The exact length to reach.

padChar - The padding character.

返回:

The adjusted string.

trimOrLeftPad

public static String trimOrLeftPad(String str,
                                   int length,
                                   char padChar)

Trims or pads this string, so it has this exact length.

参数:

str - The string to adjust. null is treated as an empty string.

length - The exact length to reach.

padChar - The padding character.

返回:

The adjusted string.

leftPad

public static String leftPad(String original,
                             int length,
                             char padChar)

collapseWhitespace

public static String collapseWhitespace(String str)

Replaces all sequences of whitespace by a single blank. Ex.: " " -> " "

参数:

str - The string to analyse.

返回:

The input string, with all whitespace collapsed.

left

public static String left(String str,
                          int count)

Returns the first n characters from this string, where n = count. If the string is shorter, the entire string will be returned. If the string is longer, it will be truncated.

参数:

str - The string to parse.

count - The amount of characters to return.

返回:

The first n characters from this string, where n = count.

replaceAll

public static String replaceAll(String str,
                                String originalToken,
                                String replacementToken)

Replaces all occurrances of this originalToken in this string with this replacementToken.

参数:

str - The string to process.

originalToken - The token to replace.

replacementToken - The replacement.

返回:

The transformed str.

hasLength

public static boolean hasLength(String str)

Checks whether this string is not null and not empty.

参数:

str - The string to check.

返回:

true if it has content, false if it is null or blank.

arrayToCommaDelimitedString

public static String arrayToCommaDelimitedString(Object[] strings)

Turns this string array in one comma-delimited string.

参数:

strings - The array to process.

返回:

The new comma-delimited string. An empty string if strings is empty. null if strings is null.

arrayToDelimitedString

public static String arrayToDelimitedString(String delimiter,
                                            Object[] strings)

Turns this string array in one delimited string.

参数:

delimiter - The delimiter to use.

strings - The array to process.

返回:

The new delimited string. An empty string if strings is empty. null if strings is null.

hasText

public static boolean hasText(String s)

Checks whether this string isn't null and contains at least one non-blank character.

参数:

s - The string to check.

返回:

true if it has text, false if not.

tokenizeToStringArray

public static String[] tokenizeToStringArray(String str,
                                             String delimiters)

Splits this string into an array using these delimiters.

参数:

str - The string to split.

delimiters - The delimiters to use.

返回:

The resulting array.

tokenizeToStringCollection

public static List<String> tokenizeToStringCollection(String str,
                                                      String delimiters)

Splits this string into a collection using these delimiters.

参数:

str - The string to split.

delimiters - The delimiters to use.

返回:

The resulting array.

tokenizeToStringCollection

public static List<String> tokenizeToStringCollection(String str,
                                                      char delimiterChar,
                                                      char groupDelimiterChar)

Splits this string into a collection using this delimiter and this group delimiter.

参数:

str - The string to split.

delimiterChar - The delimiter to use.

groupDelimiterChar - The character to use to delimit groups.

返回:

The resulting array.

countOccurrencesOf

public static int countOccurrencesOf(String str,
                                     String token)

Counts the number of occurrences of this token in this string.

参数:

str - The string to analyse.

token - The token to look for.

返回:

The number of occurrences.

replace

public static String replace(String inString,
                             String oldPattern,
                             String newPattern)

Replace all occurences of a substring within a string with another string.

参数:

inString - String to examine

oldPattern - String to replace

newPattern - String to insert

返回:

a String with the replacements

collectionToCommaDelimitedString

public static String collectionToCommaDelimitedString(Collection<?> collection)

Convenience method to return a Collection as a comma-delimited String. E.g. useful for toString() implementations.

参数:

collection - the Collection to analyse

返回:

The comma-delimited String.

collectionToDelimitedString

public static String collectionToDelimitedString(Collection<?> collection,
                                                 String delimiter)

Convenience method to return a Collection as a delimited String. E.g. useful for toString() implementations.

参数:

collection - the Collection to analyse

delimiter - The delimiter.

返回:

The delimited String.

trimLeadingWhitespace

public static String trimLeadingWhitespace(String str)

Trim leading whitespace from the given String.

参数:

str - the String to check

返回:

the trimmed String

另请参阅:

Character.isWhitespace(char)

trimLeadingCharacter

public static String trimLeadingCharacter(String str,
                                          char character)

Trim any leading occurrence of this character from the given String.

参数:

str - the String to check.

character - The character to trim.

返回:

the trimmed String

另请参阅:

Character.isWhitespace(char)

trimTrailingWhitespace

public static String trimTrailingWhitespace(String str)

Trim trailing whitespace from the given String.

参数:

str - the String to check

返回:

the trimmed String

另请参阅:

Character.isWhitespace(char)

startsAndEndsWith

public static boolean startsAndEndsWith(String str,
                                        String prefix,
                                        String... suffixes)

Checks whether this strings both begins with this prefix and ends withs either of these suffixes.

参数:

str - The string to check.

prefix - The prefix.

suffixes - The suffixes.

返回:

true if it does, false if not.

trimLineBreak

public static String trimLineBreak(String str)

Trim the trailing linebreak (if any) from this string.

参数:

str - The string.

返回:

The string without trailing linebreak.

wrap

public static String wrap(String str,
                          int lineSize)

Wrap this string every lineSize characters.

参数:

str - The string to wrap.

lineSize - The maximum size of each line.

返回:

The wrapped string.

wordWrap

public static String wordWrap(String str,
                              int lineSize)

Wrap this string at the word boundary at or below lineSize characters.

参数:

str - The string to wrap.

lineSize - The maximum size of each line.

返回:

The word-wrapped string.

isCharAnyOf

public static boolean isCharAnyOf(char c,
                                  String chars)

Checks whether this characters matches any of these characters.

参数:

c - The char to check.

chars - The chars that should match.

返回:

true if it does, false if not.