StringUtil (jcseg-core 2.0.0 API)

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 and Description

static int EN_LETTER

static int EN_NUMERIC

static int EN_PUNCTUATION

static int EN_UNKNOW

static int EN_WHITESPACE

Fields
Modifier and Type	Field and 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 and Description

StringUtil()

Constructors
Constructor and Description
`StringUtil()`

Method Summary

Methods
Modifier and Type	Method and Description
`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`	`isCJKChar(int c)` check the specified char is CJK, Thai...
`static boolean`	`isCnPunctuation(int c)`
`static boolean`	`isDecimal(String str)` check the specified char is a decimal including the full-width char
`static boolean`	`isDigit(String str)` 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 true will be return if it is or return false this method can recognize full-width char and 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 specifield char is an english numeric(48-57) including the full-width char
`static boolean`	`isEnPunctuation(int c)` check 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`	`isLetterNumber(int c)` check the specified char is Letter number like 'ⅠⅡ' true will be return if it is, or return false
`static boolean`	`isLowerCaseLetter(int u)`
`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`	`isUpperCaseLetter(int u)`
`static boolean`	`isWhitespace(int c)` check the given string is a whitespace
`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
  - 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 -
  - isEnNumeric
```
public static boolean isEnNumeric(int u)
```
    check the specifield char is an english numeric(48-57) including the full-width char
    
    Parameters:
    u -
  - 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 -> punctuations
    - 48-57 -> 0-9
    - 58-64 -> punctuations
    - 65-90 -> A-Z
    - 91-96 -> punctuations
    - 97-122 -> a-z
    - 123-126 -> punctuations
    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 the given char is half-width punctuation
    
    Parameters:
    c -
    
    Returns:
    boolean
  - isCnPunctuation
```
public static boolean isCnPunctuation(int c)
```
  - 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)
```
    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 -
    
    Returns:
    boolean
  - isDecimal
```
public static boolean isDecimal(String str)
```
    check the specified char is a decimal including the full-width char
    
    Parameters:
    str -
    
    Returns:
    boolean
  - 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

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

isUpperCaseLetter

isLowerCaseLetter

toLowerCase

toUpperCase

isEnLetter

isEnNumeric

getEnCharType

isHWEnChar

isFWEnChar

isEnPunctuation

isCnPunctuation

isWhitespace

isDigit

isDecimal

fwsTohws

hwsTofws

isPairPunctuation

getPunctuationPair