java.lang.Object
- org.lionsoul.jcseg.util.StringUtil

```
public class StringUtil
extends Object
```
a class to deal with the English stop char like the English punctuation

Author:

chenxin

Field Summary

Fields
Modifier and Type Field Description

static int EN_LETTER

static int EN_NUMERIC

static int EN_PUNCTUATION

static int EN_UNKNOW

static int EN_WHITESPACE

Constructor Summary

Constructors
Constructor Description

StringUtil()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`CJKIndexOf(String str)`
`static int`	`CJKIndexOf(String str, int offset)`	get the index of the first CJK char of the specified string
`static String`	`fwsTohws(String str)`	a static method to replace the full-width char to the half-width char in a given string (65281-65374 for full-width char)
`static int`	`getEnCharType(int u)`	get the type of the English char defined in this class and start with EN_.
`static char`	`getPunctuationPair(char c)`	get the pair punctuation' pair
`static String`	`hwsTofws(String str)`	a static method to replace the half-width char to the full-width char in a given string
`static boolean`	`isCJK(String str)`
`static boolean`	`isCJK(String str, int beginIndex, int endIndex)`	check if the specified string is all CJK chars
`static boolean`	`isCJKChar(int c)`	check the specified char is CJK, Thai...
`static boolean`	`isCnPunctuation(int c)`
`static boolean`	`isDecimal(String str)`
`static boolean`	`isDecimal(String str, int beginIndex, int endIndex)`	check the specified char is a decimal including the full-width char
`static boolean`	`isDigit(String str)`
`static boolean`	`isDigit(String str, int beginIndex, int endIndex)`	check the specified char is a digit or not true will return if it is or return false this method can recognize full-with char
`static boolean`	`isEnChar(int c)`	check the specified char is a basic Latin and Russia and Greece letter.
`static boolean`	`isENKeepPunctuaton(char c)`	check the given char is English keep punctuation
`static boolean`	`isEnLetter(int u)`	include the full-width and half-width char
`static boolean`	`isEnNumeric(int u)`	check the specified char is an English numeric(48-57) including the full-width char
`static boolean`	`isEnPunctuation(int c)`	check if the given char is half-width punctuation
`static boolean`	`isFWEnChar(int c)`	check the given char is a full-width char AT+reader: the full-width punctuation is not included here
`static boolean`	`isHWEnChar(int c)`	check the given char is a half-width char or not
`static boolean`	`isLatin(String str)`
`static boolean`	`isLatin(String str, int beginIndex, int endIndex)`	check if the specified string is all Latin chars
`static boolean`	`isLetter(String str)`
`static boolean`	`isLetter(String str, int beginIndex, int endIndex)`	check if the specified string is Latin letter
`static boolean`	`isLetterNumber(int c)`	check the specified char is Letter number like 'ⅠⅡ' true will be return if it is, or return false
`static boolean`	`isLetterOrNumeric(String str)`
`static boolean`	`isLetterOrNumeric(String str, int beginIndex, int endIndex)`	check if the specified string is Latin numeric or letter
`static boolean`	`isLowerCaseLetter(int u)`
`static boolean`	`isNoTailingPunctuation(char c)`	check if the given punctuation is the one that need to be cleared
`static boolean`	`isNumeric(String str)`
`static boolean`	`isNumeric(String str, int beginIndex, int endIndex)`	check if the specified string is Latin numeric
`static boolean`	`isOtherNumber(int c)`	check the specified char is other number like '①⑩⑽㈩' true will be return if it is, or return false
`static boolean`	`isPairPunctuation(char c)`	check the given char is pair punctuation or not
`static boolean`	`isPunctuation(int c)`	check if the given char is a punctuation
`static boolean`	`isPunctuation(String str)`
`static boolean`	`isPunctuation(String str, int beginIndex, int endIndex)`	Check if the specified string is all punctuation chars (English and Chinese punctuation)
`static boolean`	`isUpperCaseLetter(int u)`
`static boolean`	`isWhitespace(int c)`	check the given string is a whitespace
`static int`	`latinIndexOf(String str)`
`static int`	`latinIndexOf(String str, int offset)`	get the index of the first Latin char of the specified string
`static int`	`toLowerCase(int u)`
`static int`	`toUpperCase(int u)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - EN_LETTER
```
public static final int EN_LETTER
```
    See Also:
    
    Constant Field Values
  - EN_NUMERIC
```
public static final int EN_NUMERIC
```
    See Also:
    
    Constant Field Values
  - EN_PUNCTUATION
```
public static final int EN_PUNCTUATION
```
    See Also:
    
    Constant Field Values
  - EN_WHITESPACE
```
public static final int EN_WHITESPACE
```
    See Also:
    
    Constant Field Values
  - EN_UNKNOW
```
public static final int EN_UNKNOW
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - StringUtil
```
public StringUtil()
```
- Method Detail
  - isCJKChar
```
public static boolean isCJKChar(int c)
```
    check the specified char is CJK, Thai... char true will be return if it is or return false
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isEnChar
```
public static boolean isEnChar(int c)
```
    check the specified char is a basic Latin and Russia and Greece letter. True will be return if it is or return false. this method can recognize full-width char and letter
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isLetterNumber
```
public static boolean isLetterNumber(int c)
```
    check the specified char is Letter number like 'ⅠⅡ' true will be return if it is, or return false
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isOtherNumber
```
public static boolean isOtherNumber(int c)
```
    check the specified char is other number like '①⑩⑽㈩' true will be return if it is, or return false
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isENKeepPunctuaton
```
public static boolean isENKeepPunctuaton(char c)
```
    check the given char is English keep punctuation
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isNoTailingPunctuation
```
public static boolean isNoTailingPunctuation(char c)
```
    check if the given punctuation is the one that need to be cleared
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isUpperCaseLetter
```
public static boolean isUpperCaseLetter(int u)
```
  - isLowerCaseLetter
```
public static boolean isLowerCaseLetter(int u)
```
  - toLowerCase
```
public static int toLowerCase(int u)
```
  - toUpperCase
```
public static int toUpperCase(int u)
```
  - isEnLetter
```
public static boolean isEnLetter(int u)
```
    include the full-width and half-width char
    
    Parameters:
    
    u -
    
    Returns:
    
    boolean
  - isEnNumeric
```
public static boolean isEnNumeric(int u)
```
    check the specified char is an English numeric(48-57) including the full-width char
    
    Parameters:
    
    u -
    
    Returns:
    
    boolean
  - getEnCharType
```
public static int getEnCharType(int u)
```
    get the type of the English char defined in this class and start with EN_. (only half-width)
    
    Parameters:
    
    u - char to identity
    
    Returns:
    
    int type keywords
  - isHWEnChar
```
public static boolean isHWEnChar(int c)
```
    check the given char is a half-width char or not
    
    32 -> whitespace
    
    33-47 -> punctuation
    
    48-57 -> 0-9
    
    58-64 -> punctuation
    
    65-90 -> A-Z
    
    91-96 -> punctuation
    
    97-122 -> a-z
    
    123-126 -> punctuation
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isFWEnChar
```
public static boolean isFWEnChar(int c)
```
    check the given char is a full-width char AT+reader: the full-width punctuation is not included here
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isEnPunctuation
```
public static boolean isEnPunctuation(int c)
```
    check if the given char is half-width punctuation
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isCnPunctuation
```
public static boolean isCnPunctuation(int c)
```
  - isPunctuation
```
public static boolean isPunctuation(int c)
```
    check if the given char is a punctuation
  - isWhitespace
```
public static boolean isWhitespace(int c)
```
    check the given string is a whitespace
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean
  - isDigit
```
public static boolean isDigit(String str,
                              int beginIndex,
                              int endIndex)
```
    check the specified char is a digit or not true will return if it is or return false this method can recognize full-with char
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isDigit
```
public static boolean isDigit(String str)
```
  - isDecimal
```
public static boolean isDecimal(String str,
                                int beginIndex,
                                int endIndex)
```
    check the specified char is a decimal including the full-width char
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isDecimal
```
public static boolean isDecimal(String str)
```
  - isLatin
```
public static boolean isLatin(String str,
                              int beginIndex,
                              int endIndex)
```
    check if the specified string is all Latin chars
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isLatin
```
public static boolean isLatin(String str)
```
  - isCJK
```
public static boolean isCJK(String str,
                            int beginIndex,
                            int endIndex)
```
    check if the specified string is all CJK chars
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isCJK
```
public static boolean isCJK(String str)
```
  - isLetterOrNumeric
```
public static boolean isLetterOrNumeric(String str,
                                        int beginIndex,
                                        int endIndex)
```
    check if the specified string is Latin numeric or letter
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isLetterOrNumeric
```
public static boolean isLetterOrNumeric(String str)
```
  - isLetter
```
public static boolean isLetter(String str,
                               int beginIndex,
                               int endIndex)
```
    check if the specified string is Latin letter
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isLetter
```
public static boolean isLetter(String str)
```
  - isNumeric
```
public static boolean isNumeric(String str,
                                int beginIndex,
                                int endIndex)
```
    check if the specified string is Latin numeric
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isNumeric
```
public static boolean isNumeric(String str)
```
  - latinIndexOf
```
public static int latinIndexOf(String str,
                               int offset)
```
    get the index of the first Latin char of the specified string
    
    Parameters:
    
    str -
    
    offset -
    
    Returns:
    
    integer
  - latinIndexOf
```
public static int latinIndexOf(String str)
```
  - CJKIndexOf
```
public static int CJKIndexOf(String str,
                             int offset)
```
    get the index of the first CJK char of the specified string
    
    Parameters:
    
    str -
    
    offset -
    
    Returns:
    
    integer
  - CJKIndexOf
```
public static int CJKIndexOf(String str)
```
  - fwsTohws
```
public static String fwsTohws(String str)
```
    a static method to replace the full-width char to the half-width char in a given string (65281-65374 for full-width char)
    
    Parameters:
    
    str -
    
    Returns:
    
    String the new String after the replace.
  - hwsTofws
```
public static String hwsTofws(String str)
```
    a static method to replace the half-width char to the full-width char in a given string
    
    Parameters:
    
    str -
    
    Returns:
    
    String the new String after the replace
  - isPairPunctuation
```
public static boolean isPairPunctuation(char c)
```
    check the given char is pair punctuation or not
    
    Parameters:
    
    c -
    
    Returns:
    
    boolean true for it is and false for not
  - getPunctuationPair
```
public static char getPunctuationPair(char c)
```
    get the pair punctuation' pair
    
    Parameters:
    
    c -
    
    Returns:
    
    char
  - isPunctuation
```
public static boolean isPunctuation(String str,
                                    int beginIndex,
                                    int endIndex)
```
    Check if the specified string is all punctuation chars (English and Chinese punctuation)
    
    Parameters:
    
    str -
    
    beginIndex -
    
    endIndex -
    
    Returns:
    
    boolean
  - isPunctuation
```
public static boolean isPunctuation(String str)
```

Modifier and Type	Field	Description
`static int`	`EN_LETTER`
`static int`	`EN_NUMERIC`
`static int`	`EN_PUNCTUATION`
`static int`	`EN_UNKNOW`
`static int`	`EN_WHITESPACE`

Class StringUtil

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

EN_LETTER

EN_NUMERIC

EN_PUNCTUATION

EN_WHITESPACE

EN_UNKNOW

Constructor Detail

StringUtil

Method Detail

isCJKChar

isEnChar

isLetterNumber

isOtherNumber

isENKeepPunctuaton

isNoTailingPunctuation

isUpperCaseLetter

isLowerCaseLetter

toLowerCase

toUpperCase

isEnLetter

isEnNumeric

getEnCharType

isHWEnChar

isFWEnChar

isEnPunctuation

isCnPunctuation

isPunctuation

isWhitespace

isDigit

isDigit

isDecimal

isDecimal

isLatin

isLatin

isCJK

isCJK

isLetterOrNumeric

isLetterOrNumeric

isLetter

isLetter

isNumeric

isNumeric

latinIndexOf

latinIndexOf

CJKIndexOf

CJKIndexOf

fwsTohws

hwsTofws

isPairPunctuation

getPunctuationPair

isPunctuation

isPunctuation