StringUtils (Paimon : Common 0.7.0-incubating API)

java.lang.Object
- org.apache.paimon.utils.StringUtils

```
public class StringUtils
extends Object
```
Utils for BinaryString and utility class to convert objects into strings in vice-versa.

字段概要

字段
限定符和类型字段和说明

static String EMPTY
The empty String "".

static int INDEX_NOT_FOUND
Represents a failed index search.

字段
限定符和类型	字段和说明
`static String`	`EMPTY` The empty String `""`.
`static int`	`INDEX_NOT_FOUND` Represents a failed index search.

构造器概要

构造器
构造器和说明

StringUtils()

构造器
构造器和说明
`StringUtils()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static String`	`bytesToBinaryString(byte[] bytes)` Given an array of bytes it will convert the bytes to a binary (0-1) string representation of the bytes.
`static String`	`byteToHexString(byte[] bytes)` Given an array of bytes it will convert the bytes to a hex string representation of the bytes.
`static String`	`byteToHexString(byte[] bytes, int start, int end)` Given an array of bytes it will convert the bytes to a hex string representation of the bytes.
`static String`	`caseSensitiveConversion(String str, boolean caseSensitive)`
`static BinaryString`	`concat(BinaryString... inputs)` Concatenates input strings together into a single string.
`static BinaryString`	`concat(Iterable<BinaryString> inputs)`
`static String`	`getRandomString(Random rnd, int minLength, int maxLength)` Creates a random string with a length within the given interval.
`static String`	`getRandomString(Random rnd, int minLength, int maxLength, char minValue, char maxValue)` Creates a random string with a length within the given interval.
`static boolean`	`isBlank(String str)`
`static boolean`	`isEmpty(CharSequence cs)` Checks if a CharSequence is empty ("") or null.
`static boolean`	`isNullOrWhitespaceOnly(String str)` Checks if the string is null, empty, or contains only whitespace characters.
`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(Iterator<?> iterator, String separator)` Joins the elements of the provided `Iterator` into a single String containing the provided elements.
`static String`	`randomNumericString(int len)`
`static String`	`repeat(String string, int count)` Returns a string consisting of a specific number of concatenated copies of an input string.
`static String`	`replace(String text, String searchString, String replacement)` Replaces all occurrences of a String within another String.
`static String`	`replace(String text, String searchString, String replacement, int max)` Replaces a String with another String inside a larger String, for the first `max` values of the search String.
`static String[]`	`split(String str, String separatorChars)` Splits the provided text into an array, separators specified.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - INDEX_NOT_FOUND
```
public static final int INDEX_NOT_FOUND
```
    Represents a failed index search.
    
    从以下版本开始:
    
    2.1
    
    另请参阅:
    
    常量字段值
  - EMPTY
```
public static final String EMPTY
```
    The empty String "".
    
    另请参阅:
    
    常量字段值
- 构造器详细资料
  - StringUtils
```
public StringUtils()
```
- 方法详细资料
  - concat
```
public static BinaryString concat(BinaryString... inputs)
```
    Concatenates input strings together into a single string. Returns NULL if any argument is NULL.
  - concat
```
public static BinaryString concat(Iterable<BinaryString> inputs)
```
  - isNullOrWhitespaceOnly
```
public static boolean isNullOrWhitespaceOnly(String str)
```
    Checks if the string is null, empty, or contains only whitespace characters. A whitespace character is defined via Character.isWhitespace(char).
    
    参数:
    
    str - The string to check
    
    返回:
    
    True, if the string is null or blank, false otherwise.
  - byteToHexString
```
public static String byteToHexString(byte[] bytes,
                                     int start,
                                     int end)
```
    Given an array of bytes it will convert the bytes to a hex string representation of the bytes.
    
    参数:
    
    bytes - the bytes to convert in a hex string
    
    start - start index, inclusively
    
    end - end index, exclusively
    
    返回:
    
    hex string representation of the byte array
  - byteToHexString
```
public static String byteToHexString(byte[] bytes)
```
    Given an array of bytes it will convert the bytes to a hex string representation of the bytes.
    
    参数:
    
    bytes - the bytes to convert in a hex string
    
    返回:
    
    hex string representation of the byte array
  - bytesToBinaryString
```
public static String bytesToBinaryString(byte[] bytes)
```
    Given an array of bytes it will convert the bytes to a binary (0-1) string representation of the bytes.
    
    参数:
    
    bytes - the bytes to be converted
    
    返回:
    
    binary string representation of the byte array
  - getRandomString
```
public static String getRandomString(Random rnd,
                                     int minLength,
                                     int maxLength)
```
    Creates a random string with a length within the given interval. The string contains only characters that can be represented as a single code point.
    
    参数:
    
    rnd - The random used to create the strings.
    
    minLength - The minimum string length.
    
    maxLength - The maximum string length (inclusive).
    
    返回:
    
    A random String.
  - getRandomString
```
public static String getRandomString(Random rnd,
                                     int minLength,
                                     int maxLength,
                                     char minValue,
                                     char maxValue)
```
    Creates a random string with a length within the given interval. The string contains only characters that can be represented as a single code point.
    
    参数:
    
    rnd - The random used to create the strings.
    
    minLength - The minimum string length.
    
    maxLength - The maximum string length (inclusive).
    
    minValue - The minimum character value to occur.
    
    maxValue - The maximum character value to occur.
    
    返回:
    
    A random String.
  - repeat
```
public static String repeat(String string,
                            int count)
```
    Returns a string consisting of a specific number of concatenated copies of an input string. For example, repeat("hey", 3) returns the string "heyheyhey".
    
    参数:
    
    string - any non-null string
    
    count - the number of times to repeat it; a nonnegative integer
    
    返回:
    
    a string containing string repeated count times (the empty string if count is zero)
    
    抛出:
    
    IllegalArgumentException - if count is negative
  - replace
```
public static String replace(String text,
                             String searchString,
                             String replacement)
```
    Replaces all occurrences of a String within another String.
    A null reference passed to this method is a no-op.
```
 StringUtils.replace(null, *, *)        = null
 StringUtils.replace("", *, *)          = ""
 StringUtils.replace("any", null, *)    = "any"
 StringUtils.replace("any", *, null)    = "any"
 StringUtils.replace("any", "", *)      = "any"
 StringUtils.replace("aba", "a", null)  = "aba"
 StringUtils.replace("aba", "a", "")    = "b"
 StringUtils.replace("aba", "a", "z")   = "zbz"
 
```
    参数:
    
    text - text to search and replace in, may be null
    
    searchString - the String to search for, may be null
    
    replacement - the String to replace it with, may be null
    
    返回:
    
    the text with any replacements processed, null if null String input
    
    另请参阅:
    
    replace(String text, String searchString, String replacement, int max)
  - replace
```
public static String replace(String text,
                             String searchString,
                             String replacement,
                             int max)
```
    Replaces a String with another String inside a larger String, for the first max values of the search String.
    A null reference passed to this method is a no-op.
```
 StringUtils.replace(null, *, *, *)         = null
 StringUtils.replace("", *, *, *)           = ""
 StringUtils.replace("any", null, *, *)     = "any"
 StringUtils.replace("any", *, null, *)     = "any"
 StringUtils.replace("any", "", *, *)       = "any"
 StringUtils.replace("any", *, *, 0)        = "any"
 StringUtils.replace("abaa", "a", null, -1) = "abaa"
 StringUtils.replace("abaa", "a", "", -1)   = "b"
 StringUtils.replace("abaa", "a", "z", 0)   = "abaa"
 StringUtils.replace("abaa", "a", "z", 1)   = "zbaa"
 StringUtils.replace("abaa", "a", "z", 2)   = "zbza"
 StringUtils.replace("abaa", "a", "z", -1)  = "zbzz"
 
```
    参数:
    
    text - text to search and replace in, may be null
    
    searchString - the String to search for, may be null
    
    replacement - the String to replace it with, may be null
    
    max - maximum number of values to replace, or -1 if no maximum
    
    返回:
    
    the text with any replacements processed, null if null String input
  - isEmpty
```
public static boolean isEmpty(CharSequence cs)
```
    Checks if a CharSequence is empty ("") or null.
```
 StringUtils.isEmpty(null)      = true
 StringUtils.isEmpty("")        = true
 StringUtils.isEmpty(" ")       = false
 StringUtils.isEmpty("bob")     = false
 StringUtils.isEmpty("  bob  ") = false
 
```
    NOTE: This method changed in Lang version 2.0. It no longer trims the CharSequence. That functionality is available in isBlank().
    参数:
    
    cs - the CharSequence to check, may be null
    
    返回:
    
    true if the CharSequence is empty or null
    
    从以下版本开始:
    
    3.0 Changed signature from isEmpty(String) to isEmpty(CharSequence)
  - randomNumericString
```
public static String randomNumericString(int len)
```
  - split
```
public static String[] split(String str,
                             String separatorChars)
```
    Splits the provided text into an array, separators specified. This is an alternative to using StringTokenizer.
    The separator is not included in the returned String array. Adjacent separators are treated as one separator. For more control over the split use the StrTokenizer class.
    A null input String returns null. A null separatorChars splits on whitespace.
```
 StringUtils.split(null, *)         = null
 StringUtils.split("", *)           = []
 StringUtils.split("abc def", null) = ["abc", "def"]
 StringUtils.split("abc def", " ")  = ["abc", "def"]
 StringUtils.split("abc  def", " ") = ["abc", "def"]
 StringUtils.split("ab:cd:ef", ":") = ["ab", "cd", "ef"]
 
```
    参数:
    
    str - the String to parse, may be null
    
    separatorChars - the characters used as the delimiters, null splits on whitespace
    
    返回:
    
    an array of parsed Strings, null if null String input
  - 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 ("").
    
    参数:
    
    iterable - the Iterable providing the values to join together, may be null
    
    separator - the separator character to use, null treated as ""
    
    返回:
    
    the joined String, null if null iterator input
  - 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 ("").
    
    参数:
    
    iterator - the Iterator of values to join together, may be null
    
    separator - the separator character to use, null treated as ""
    
    返回:
    
    the joined String, null if null iterator input
  - isBlank
```
public static boolean isBlank(String str)
```
  - caseSensitiveConversion
```
public static String caseSensitiveConversion(String str,
                                             boolean caseSensitive)
```

类 StringUtils

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

INDEX_NOT_FOUND

EMPTY

构造器详细资料

StringUtils

方法详细资料

concat

concat

isNullOrWhitespaceOnly

byteToHexString

byteToHexString

bytesToBinaryString

getRandomString

getRandomString

repeat

replace

replace

isEmpty

randomNumericString

split

join

join

isBlank

caseSensitiveConversion