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java.lang.Object
com.ibm.icu.lang.UCharacter
set CLASSPATH=%CLASSPATH%;$JAR_FILE_PATH/ucharacter.jar
.UCharacterEnums
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public static final int FOLD_CASE_DEFAULT
Option value for case folding: use default mappings defined in CaseFolding.txt.
- Field Value:
- 0
public static final int FOLD_CASE_EXCLUDE_SPECIAL_I
Option value for case folding: exclude the mappings for dotted I and dotless i marked with 'I' in CaseFolding.txt.
- Field Value:
- 1
public static final int MAX_CODE_POINT
Cover the JDK 1.5 API, for convenience.
- Field Value:
- 1114111
- See Also:
UTF16.CODEPOINT_MAX_VALUE
public static final char MAX_HIGH_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\udbff'
- See Also:
UTF16.LEAD_SURROGATE_MAX_VALUE
public static final char MAX_LOW_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\udfff'
- See Also:
UTF16.TRAIL_SURROGATE_MAX_VALUE
public static final int MAX_RADIX
Compatibility constant for Java Character's MAX_RADIX.
public static final char MAX_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\udfff'
- See Also:
UTF16.SURROGATE_MAX_VALUE
public static final int MAX_VALUE
The highest Unicode code point value (scalar value) according to the Unicode Standard. This is a 21-bit value (21 bits, rounded up).
Up-to-date Unicode implementation of java.lang.Character.MIN_VALUE
- Field Value:
- 1114111
public static final int MIN_CODE_POINT
Cover the JDK 1.5 API, for convenience.
- Field Value:
- 0
- See Also:
UTF16.CODEPOINT_MIN_VALUE
public static final char MIN_HIGH_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\ud800'
- See Also:
UTF16.LEAD_SURROGATE_MIN_VALUE
public static final char MIN_LOW_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\udc00'
- See Also:
UTF16.TRAIL_SURROGATE_MIN_VALUE
public static final int MIN_RADIX
Compatibility constant for Java Character's MIN_RADIX.
public static final int MIN_SUPPLEMENTARY_CODE_POINT
Cover the JDK 1.5 API, for convenience.
- Field Value:
- 65536
- See Also:
UTF16.SUPPLEMENTARY_MIN_VALUE
public static final char MIN_SURROGATE
Cover the JDK 1.5 API, for convenience.
- Field Value:
- '\ud800'
- See Also:
UTF16.SURROGATE_MIN_VALUE
public static final int MIN_VALUE
The lowest Unicode code point value.
- Field Value:
- 0
public static final double NO_NUMERIC_VALUE
Special value that is returned by getUnicodeNumericValue(int) when no numeric value is defined for a code point.
- Field Value:
- -1.23456789E8
- See Also:
getUnicodeNumericValue(int)
public static final int REPLACEMENT_CHAR
Unicode value used when translating into Unicode encoding form and there is no existing character.
- Field Value:
- 65533
public static final int SUPPLEMENTARY_MIN_VALUE
The minimum value for Supplementary code points
- Field Value:
- 65536
public static int charCount(int cp)
Cover the JDK 1.5 API, for convenience. Return the number of chars needed to represent the code point. This does not check the code point for validity.
- Parameters:
cp
- the code point to check
- Returns:
- the number of chars needed to represent the code point
- See Also:
UTF16.getCharCount(int)
public static final int codePointAt(CharSequence seq, int index)
Cover the JDK 1.5 API, for convenience. Return the code point at index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index and index+1.
- Parameters:
seq
- the characters to checkindex
- the index of the first or only char forming the code point
- Returns:
- the code point at the index
public static final int codePointAt(char[] text, int index)
Cover the JDK 1.5 API, for convenience. Return the code point at index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index and index+1.
- Parameters:
text
- the characters to checkindex
- the index of the first or only char forming the code point
- Returns:
- the code point at the index
public static final int codePointAt(char[] text, int index, int limit)
Cover the JDK 1.5 API, for convenience. Return the code point at index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index and index+1.
- Parameters:
text
- the characters to checkindex
- the index of the first or only char forming the code pointlimit
- the limit of the valid text
- Returns:
- the code point at the index
public static final int codePointBefore(CharSequence seq, int index)
Cover the JDK 1.5 API, for convenience. Return the code point before index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index-1 and index-2.
- Parameters:
seq
- the characters to checkindex
- the index after the last or only char forming the code point
- Returns:
- the code point before the index
public static final int codePointBefore(char[] text, int index)
Cover the JDK 1.5 API, for convenience. Return the code point before index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index-1 and index-2.
- Parameters:
text
- the characters to checkindex
- the index after the last or only char forming the code point
- Returns:
- the code point before the index
public static final int codePointBefore(char[] text, int index, int limit)
Cover the JDK 1.5 API, for convenience. Return the code point before index.
Note: the semantics of this API is different from the related UTF16 API. This examines only the characters at index-1 and index-2.
- Parameters:
text
- the characters to checkindex
- the index after the last or only char forming the code pointlimit
- the start of the valid text
- Returns:
- the code point before the index
public static int codePointCount(CharSequence text, int start, int limit)
Cover the JDK API, for convenience. Count the number of code points in the range of text.
- Parameters:
text
- the characters to checkstart
- the start of the rangelimit
- the limit of the range
- Returns:
- the number of code points in the range
public static int codePointCount(char[] text, int start, int limit)
Cover the JDK API, for convenience. Count the number of code points in the range of text.
- Parameters:
text
- the characters to checkstart
- the start of the rangelimit
- the limit of the range
- Returns:
- the number of code points in the range
public static int digit(int ch)
Retrieves the numeric value of a decimal digit code point.
This is a convenience overload ofdigit(int, int)
that provides a decimal radix.
Semantic Change: In release 1.3.1 and prior, this treated numeric letters and other numbers as digits. This has been changed to conform to the java semantics.
- Parameters:
ch
- the code point to query
- Returns:
- the numeric value represented by the code point, or -1 if the code point is not a decimal digit or if its value is too large for a decimal radix
public static int digit(int ch, int radix)
Retrieves the numeric value of a decimal digit code point.
This method observes the semantics ofjava.lang.Character.digit()
. Note that this will return positive values for code points for which isDigit returns false, just like java.lang.Character.
Semantic Change: In release 1.3.1 and prior, this did not treat the European letters as having a digit value, and also treated numeric letters and other numbers as digits. This has been changed to conform to the java semantics.
A code point is a valid digit if and only if:
- ch is a decimal digit or one of the european letters, and
- the value of ch is less than the specified radix.
- Parameters:
ch
- the code point to queryradix
- the radix
- Returns:
- the numeric value represented by the code point in the specified radix, or -1 if the code point is not a decimal digit or if its value is too large for the radix
public static String foldCase(String str, boolean defaultmapping)
The given string is mapped to its case folding equivalent according to UnicodeData.txt and CaseFolding.txt; if any character has no case folding equivalent, the character itself is returned. "Full", multiple-code point case folding mappings are returned here. For "simple" single-code point mappings use the API foldCase(int ch, boolean defaultmapping).
- Parameters:
str
- the String to be converteddefaultmapping
- Indicates if all mappings defined in CaseFolding.txt is to be used, otherwise the mappings for dotted I and dotless i marked with 'I' in CaseFolding.txt will be skipped.
- Returns:
- the case folding equivalent of the character, if any; otherwise the character itself.
- See Also:
foldCase(int,boolean)
public static final String foldCase(String str, int options)
The given string is mapped to its case folding equivalent according to UnicodeData.txt and CaseFolding.txt; if any character has no case folding equivalent, the character itself is returned. "Full", multiple-code point case folding mappings are returned here. For "simple" single-code point mappings use the API foldCase(int ch, boolean defaultmapping).
- Parameters:
str
- the String to be convertedoptions
- A bit set for special processing. Currently the recognised options are FOLD_CASE_EXCLUDE_SPECIAL_I and FOLD_CASE_DEFAULT
- Returns:
- the case folding equivalent of the character, if any; otherwise the character itself.
- See Also:
foldCase(int,boolean)
public static int foldCase(int ch, boolean defaultmapping)
The given character is mapped to its case folding equivalent according to UnicodeData.txt and CaseFolding.txt; if the character has no case folding equivalent, the character itself is returned. This function only returns the simple, single-code point case mapping. Full case mappings should be used whenever possible because they produce better results by working on whole strings. They can map to a result string with a different length as appropriate. Full case mappings are applied by the case mapping functions that take String parameters rather than code points (int). See also the User Guide chapter on C/POSIX migration: http://icu.sourceforge.net/userguide/posix.html#case_mappings
- Parameters:
ch
- the character to be converteddefaultmapping
- Indicates if all mappings defined in CaseFolding.txt is to be used, otherwise the mappings for dotted I and dotless i marked with 'I' in CaseFolding.txt will be skipped.
- Returns:
- the case folding equivalent of the character, if any; otherwise the character itself.
- See Also:
foldCase(String,boolean)
public static int foldCase(int ch, int options)
The given character is mapped to its case folding equivalent according to UnicodeData.txt and CaseFolding.txt; if the character has no case folding equivalent, the character itself is returned. This function only returns the simple, single-code point case mapping. Full case mappings should be used whenever possible because they produce better results by working on whole strings. They can map to a result string with a different length as appropriate. Full case mappings are applied by the case mapping functions that take String parameters rather than code points (int). See also the User Guide chapter on C/POSIX migration: http://icu.sourceforge.net/userguide/posix.html#case_mappings
- Parameters:
ch
- the character to be convertedoptions
- A bit set for special processing. Currently the recognised options are FOLD_CASE_EXCLUDE_SPECIAL_I and FOLD_CASE_DEFAULT
- Returns:
- the case folding equivalent of the character, if any; otherwise the character itself.
- See Also:
foldCase(String,boolean)
public static char forDigit(int digit, int radix)
Provide the java.lang.Character forDigit API, for convenience.
public static VersionInfo getAge(int ch)
Get the "age" of the code point. The "age" is the Unicode version when the code point was first designated (as a non-character or for Private Use) or assigned a character. This can be useful to avoid emitting code points to receiving processes that do not accept newer characters. The data is from the UCD file DerivedAge.txt.
- Parameters:
ch
- The code point.
- Returns:
- the Unicode version number
public static int getCharFromExtendedName(String name)
Find a Unicode character by either its name and return its code point value. All Unicode names are in uppercase. Extended names are all lowercase except for numbers and are contained within angle brackets. The names are searched in the following orderNote calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Most current Unicode name if there is any
- Unicode 1.0 name if there is any
- Extended name in the form of "
". E.g.
- Parameters:
name
- codepoint name
- Returns:
- code point associated with the name or -1 if the name is not found.
public static int getCharFromName(String name)
Find a Unicode code point by its most current Unicode name and return its code point value. All Unicode names are in uppercase. Note calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Parameters:
name
- most current Unicode character name whose code point is to be returned
- Returns:
- code point or -1 if name is not found
public static int getCharFromName1_0(String name)
Find a Unicode character by its version 1.0 Unicode name and return its code point value. All Unicode names are in uppercase. Note calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Parameters:
name
- Unicode 1.0 code point name whose code point is to returned
- Returns:
- code point or -1 if name is not found
public static int getCodePoint(char char16)
Returns the code point corresponding to the UTF16 character.
- Parameters:
char16
- the UTF16 character
- Returns:
- code point if argument is a valid character.
public static int getCodePoint(char lead, char trail)
Returns a code point corresponding to the two UTF16 characters.
- Parameters:
lead
- the lead chartrail
- the trail char
- Returns:
- code point if surrogate characters are valid.
public static int getCombiningClass(int ch)
Gets the combining class of the argument codepoint
- Parameters:
ch
- code point whose combining is to be retrieved
- Returns:
- the combining class of the codepoint
public static int getDirection(int ch)
Returns the Bidirection property of a code point. For example, 0x0041 (letter A) has the LEFT_TO_RIGHT directional property.
Result returned belongs to the interface UCharacterDirection
- Parameters:
ch
- the code point to be determined its direction
- Returns:
- direction constant from UCharacterDirection.
public static byte getDirectionality(int cp)
Cover the JDK API, for convenience. Return a byte representing the directionality of the character.
Note: Unlike the JDK, this returns DIRECTIONALITY_LEFT_TO_RIGHT for undefined or out-of-bounds characters.
Note: The return value must be tested using the constants defined inUCharacterEnums.ECharacterDirection
since the values are different from the ones defined byjava.lang.Character
.
- Parameters:
cp
- the code point to check
- Returns:
- the directionality of the code point
- See Also:
getDirection(int)
public static String getExtendedName(int ch)
Retrieves a name for a valid codepoint. Unlike, getName(int) and getName1_0(int), this method will return a name even for codepoints that are not assigned a name in UnicodeData.txt. The names are returned in the following order.Note calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Most current Unicode name if there is any
- Unicode 1.0 name if there is any
- Extended name in the form of "
". E.g.
- Parameters:
ch
- the code point for which to get the name
- Returns:
- a name for the argument codepoint
public static ValueIterator getExtendedNameIterator()
Gets an iterator for character names, iterating over codepoints. This API only gets the iterator for the extended names. For modern, most up-to-date Unicode names use getNameIterator() or for older 1.0 Unicode names use get1_0NameIterator(). Example of use:
ValueIterator iterator = UCharacter.getExtendedNameIterator(); ValueIterator.Element element = new ValueIterator.Element(); while (iterator.next(element)) { System.out.println("Codepoint \\u" + Integer.toHexString(element.codepoint) + " has the name " + (String)element.value); }The maximal range which the name iterator iterates is from
- Returns:
- an iterator
public static int getHanNumericValue(int ch)
Return numeric value of Han code points.
This returns the value of Han 'numeric' code points, including those for zero, ten, hundred, thousand, ten thousand, and hundred million. This includes both the standard and 'checkwriting' characters, the 'big circle' zero character, and the standard zero character.
- Parameters:
ch
- code point to query
- Returns:
- value if it is a Han 'numeric character,' otherwise return -1.
public static String getISOComment(int ch)
Get the ISO 10646 comment for a character. The ISO 10646 comment is an informative field in the Unicode Character Database (UnicodeData.txt field 11) and is from the ISO 10646 names list.
- Parameters:
ch
- The code point for which to get the ISO comment. It must be0<=c<=0x10ffff
.
- Returns:
- The ISO comment, or null if there is no comment for this character.
public static int getIntPropertyMaxValue(int type)
Get the maximum value for an integer/binary Unicode property. Can be used together with UCharacter.getIntPropertyMinValue(int) to allocate arrays of com.ibm.icu.text.UnicodeSet or similar. Examples for min/max values (for Unicode 3.2):For undefined UProperty constant values, min/max values will be 0/-1.
- UProperty.BIDI_CLASS: 0/18 (UCharacterDirection.LEFT_TO_RIGHT/UCharacterDirection.BOUNDARY_NEUTRAL)
- UProperty.SCRIPT: 0/45 (UScript.COMMON/UScript.TAGBANWA)
- UProperty.IDEOGRAPHIC: 0/1 (false/true)
- Parameters:
type
- UProperty selector constant, identifies which binary property to check. Must be UProperty.BINARY_START <= type < UProperty.BINARY_LIMIT or UProperty.INT_START <= type < UProperty.INT_LIMIT.
- Returns:
- Maximum value returned by u_getIntPropertyValue for a Unicode property. <= 0 if the property selector 'type' is out of range.
public static int getIntPropertyMinValue(int type)
Get the minimum value for an integer/binary Unicode property type. Can be used together with UCharacter.getIntPropertyMaxValue(int) to allocate arrays of com.ibm.icu.text.UnicodeSet or similar.
- Parameters:
type
- UProperty selector constant, identifies which binary property to check. Must be UProperty.BINARY_START <= type < UProperty.BINARY_LIMIT or UProperty.INT_START <= type < UProperty.INT_LIMIT.
- Returns:
- Minimum value returned by UCharacter.getIntPropertyValue(int) for a Unicode property. 0 if the property selector 'type' is out of range.
public static int getIntPropertyValue(int ch, int type)
Gets the property value for an Unicode property type of a code point. Also returns binary and mask property values. Unicode, especially in version 3.2, defines many more properties than the original set in UnicodeData.txt. The properties APIs are intended to reflect Unicode properties as defined in the Unicode Character Database (UCD) and Unicode Technical Reports (UTR). For details about the properties see http://www.unicode.org/. For names of Unicode properties see the UCD file PropertyAliases.txt.Sample usage: int ea = UCharacter.getIntPropertyValue(c, UProperty.EAST_ASIAN_WIDTH); int ideo = UCharacter.getIntPropertyValue(c, UProperty.IDEOGRAPHIC); boolean b = (ideo == 1) ? true : false;
- Parameters:
ch
- code point to test.type
- UProperty selector constant, identifies which binary property to check. Must be UProperty.BINARY_START <= type < UProperty.BINARY_LIMIT or UProperty.INT_START <= type < UProperty.INT_LIMIT or UProperty.MASK_START <= type < UProperty.MASK_LIMIT.
- Returns:
- numeric value that is directly the property value or, for enumerated properties, corresponds to the numeric value of the enumerated constant of the respective property value enumeration type (cast to enum type if necessary). Returns 0 or 1 (for false / true) for binary Unicode properties. Returns a bit-mask for mask properties. Returns 0 if 'type' is out of bounds or if the Unicode version does not have data for the property at all, or not for this code point.
public static int getMirror(int ch)
Maps the specified code point to a "mirror-image" code point. For code points with the "mirrored" property, implementations sometimes need a "poor man's" mapping to another code point such that the default glyph may serve as the mirror-image of the default glyph of the specified code point.
This is useful for text conversion to and from codepages with visual order, and for displays without glyph selection capabilities.
- Parameters:
ch
- code point whose mirror is to be retrieved
- Returns:
- another code point that may serve as a mirror-image substitute, or ch itself if there is no such mapping or ch does not have the "mirrored" property
public static String getName(String s, String separator)
Gets the names for each of the characters in a string
- Parameters:
s
- string to formatseparator
- string to go between names
- Returns:
- string of names
public static String getName(int ch)
Retrieve the most current Unicode name of the argument code point, or null if the character is unassigned or outside the range UCharacter.MIN_VALUE and UCharacter.MAX_VALUE or does not have a name.
Note calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Parameters:
ch
- the code point for which to get the name
- Returns:
- most current Unicode name
public static String getName1_0(int ch)
Retrieve the earlier version 1.0 Unicode name of the argument code point, or null if the character is unassigned or outside the range UCharacter.MIN_VALUE and UCharacter.MAX_VALUE or does not have a name.
Note calling any methods related to code point names, e.g. get*Name*() incurs a one-time initialisation cost to construct the name tables.
- Parameters:
ch
- the code point for which to get the name
- Returns:
- version 1.0 Unicode name
public static ValueIterator getName1_0Iterator()
Gets an iterator for character names, iterating over codepoints. This API only gets the iterator for the older 1.0 Unicode names. For modern, most up-to-date Unicode names use getNameIterator() or for extended names use getExtendedNameIterator(). Example of use:
ValueIterator iterator = UCharacter.get1_0NameIterator(); ValueIterator.Element element = new ValueIterator.Element(); while (iterator.next(element)) { System.out.println("Codepoint \\u" + Integer.toHexString(element.codepoint) + " has the name " + (String)element.value); }The maximal range which the name iterator iterates is from
- Returns:
- an iterator
public static ValueIterator getNameIterator()
Gets an iterator for character names, iterating over codepoints. This API only gets the iterator for the modern, most up-to-date Unicode names. For older 1.0 Unicode names use get1_0NameIterator() or for extended names use getExtendedNameIterator(). Example of use:
ValueIterator iterator = UCharacter.getNameIterator(); ValueIterator.Element element = new ValueIterator.Element(); while (iterator.next(element)) { System.out.println("Codepoint \\u" + Integer.toHexString(element.codepoint) + " has the name " + (String)element.value); }The maximal range which the name iterator iterates is from UCharacter.MIN_VALUE to UCharacter.MAX_VALUE.
- Returns:
- an iterator
public static int getNumericValue(int ch)
Returns the numeric value of the code point as a nonnegative integer.
If the code point does not have a numeric value, then -1 is returned.
If the code point has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.
- Parameters:
ch
- the code point to query
- Returns:
- the numeric value of the code point, or -1 if it has no numeric value, or -2 if it has a numeric value that cannot be represented as a nonnegative integer
public static int getPropertyEnum(String propertyAlias)
Return the UProperty selector for a given property name, as specified in the Unicode database file PropertyAliases.txt. Short, long, and any other variants are recognized. In addition, this function maps the synthetic names "gcm" / "General_Category_Mask" to the property UProperty.GENERAL_CATEGORY_MASK. These names are not in PropertyAliases.txt.
- Parameters:
propertyAlias
- the property name to be matched. The name is compared using "loose matching" as described in PropertyAliases.txt.
- Returns:
- a UProperty enum.
- See Also:
UProperty
public static String getPropertyName(int property, int nameChoice)
Return the Unicode name for a given property, as given in the Unicode database file PropertyAliases.txt. Most properties have more than one name. The nameChoice determines which one is returned. In addition, this function maps the property UProperty.GENERAL_CATEGORY_MASK to the synthetic names "gcm" / "General_Category_Mask". These names are not in PropertyAliases.txt.
- Parameters:
property
- UProperty selector.nameChoice
- UProperty.NameChoice selector for which name to get. All properties have a long name. Most have a short name, but some do not. Unicode allows for additional names; if present these will be returned by UProperty.NameChoice.LONG + i, where i=1, 2,...
- Returns:
- a name, or null if Unicode explicitly defines no name ("n/a") for a given property/nameChoice. If a given nameChoice throws an exception, then all larger values of nameChoice will throw an exception. If null is returned for a given nameChoice, then other nameChoice values may return non-null results.
- See Also:
UProperty
,UProperty.NameChoice
public static int getPropertyValueEnum(int property, String valueAlias)
Return the property value integer for a given value name, as specified in the Unicode database file PropertyValueAliases.txt. Short, long, and any other variants are recognized. Note: Some of the names in PropertyValueAliases.txt will only be recognized with UProperty.GENERAL_CATEGORY_MASK, not UProperty.GENERAL_CATEGORY. These include: "C" / "Other", "L" / "Letter", "LC" / "Cased_Letter", "M" / "Mark", "N" / "Number", "P" / "Punctuation", "S" / "Symbol", and "Z" / "Separator".
- Parameters:
property
- UProperty selector constant. UProperty.INT_START <= property < UProperty.INT_LIMIT or UProperty.BINARY_START <= property < UProperty.BINARY_LIMIT or UProperty.MASK_START < = property < UProperty.MASK_LIMIT. Only these properties can be enumerated.valueAlias
- the value name to be matched. The name is compared using "loose matching" as described in PropertyValueAliases.txt.
- Returns:
- a value integer. Note: UProperty.GENERAL_CATEGORY values are mask values produced by left-shifting 1 by UCharacter.getType(). This allows grouped categories such as [:L:] to be represented.
- See Also:
UProperty
public static String getPropertyValueName(int property, int value, int nameChoice)
Return the Unicode name for a given property value, as given in the Unicode database file PropertyValueAliases.txt. Most values have more than one name. The nameChoice determines which one is returned. Note: Some of the names in PropertyValueAliases.txt can only be retrieved using UProperty.GENERAL_CATEGORY_MASK, not UProperty.GENERAL_CATEGORY. These include: "C" / "Other", "L" / "Letter", "LC" / "Cased_Letter", "M" / "Mark", "N" / "Number", "P" / "Punctuation", "S" / "Symbol", and "Z" / "Separator".
- Parameters:
property
- UProperty selector constant. UProperty.INT_START <= property < UProperty.INT_LIMIT or UProperty.BINARY_START <= property < UProperty.BINARY_LIMIT or UProperty.MASK_START < = property < UProperty.MASK_LIMIT. If out of range, null is returned.value
- selector for a value for the given property. In general, valid values range from 0 up to some maximum. There are a few exceptions: (1.) UProperty.BLOCK values begin at the non-zero value BASIC_LATIN.getID(). (2.) UProperty.CANONICAL_COMBINING_CLASS values are not contiguous and range from 0..240. (3.) UProperty.GENERAL_CATEGORY_MASK values are mask values produced by left-shifting 1 by UCharacter.getType(). This allows grouped categories such as [:L:] to be represented. Mask values are non-contiguous.nameChoice
- UProperty.NameChoice selector for which name to get. All values have a long name. Most have a short name, but some do not. Unicode allows for additional names; if present these will be returned by UProperty.NameChoice.LONG + i, where i=1, 2,...
- Returns:
- a name, or null if Unicode explicitly defines no name ("n/a") for a given property/value/nameChoice. If a given nameChoice throws an exception, then all larger values of nameChoice will throw an exception. If null is returned for a given nameChoice, then other nameChoice values may return non-null results.
- See Also:
UProperty
,UProperty.NameChoice
public static String getStringPropertyValue(int propertyEnum, int codepoint, int nameChoice)
Deprecated. This API is ICU internal only.
Returns a string version of the property value.
- Parameters:
propertyEnum
-codepoint
-nameChoice
-
- Returns:
- value as string
public static int getType(int ch)
Returns a value indicating a code point's Unicode category. Up-to-date Unicode implementation of java.lang.Character.getType() except for the above mentioned code points that had their category changed.
Return results are constants from the interface UCharacterCategory
NOTE: the UCharacterCategory values are not compatible with those returned by java.lang.Character.getType. UCharacterCategory values match the ones used in ICU4C, while java.lang.Character type values, though similar, skip the value 17.
- Parameters:
ch
- code point whose type is to be determined
- Returns:
- category which is a value of UCharacterCategory
public static RangeValueIterator getTypeIterator()
Gets an iterator for character types, iterating over codepoints. Example of use:
RangeValueIterator iterator = UCharacter.getTypeIterator(); RangeValueIterator.Element element = new RangeValueIterator.Element(); while (iterator.next(element)) { System.out.println("Codepoint \\u" + Integer.toHexString(element.start) + " to codepoint \\u" + Integer.toHexString(element.limit - 1) + " has the character type " + element.value); }
- Returns:
- an iterator
public static double getUnicodeNumericValue(int ch)
Get the numeric value for a Unicode code point as defined in the Unicode Character Database. A "double" return type is necessary because some numeric values are fractions, negative, or too large for int. For characters without any numeric values in the Unicode Character Database, this function will return NO_NUMERIC_VALUE. API Change: In release 2.2 and prior, this API has a return type int and returns -1 when the argument ch does not have a corresponding numeric value. This has been changed to synch with ICU4C This corresponds to the ICU4C function u_getNumericValue.
- Parameters:
ch
- Code point to get the numeric value for.
- Returns:
- numeric value of ch, or NO_NUMERIC_VALUE if none is defined.
public static VersionInfo getUnicodeVersion()
Gets the version of Unicode data used.
- Returns:
- the unicode version number used
public static boolean hasBinaryProperty(int ch, int property)
Check a binary Unicode property for a code point. Unicode, especially in version 3.2, defines many more properties than the original set in UnicodeData.txt. This API is intended to reflect Unicode properties as defined in the Unicode Character Database (UCD) and Unicode Technical Reports (UTR). For details about the properties see http://www.unicode.org/. For names of Unicode properties see the UCD file PropertyAliases.txt. This API does not check the validity of the codepoint. Important: If ICU is built with UCD files from Unicode versions below 3.2, then properties marked with "new" are not or not fully available.
- Parameters:
ch
- code point to test.property
- selector constant from com.ibm.icu.lang.UProperty, identifies which binary property to check.
- Returns:
- true or false according to the binary Unicode property value for ch. Also false if property is out of bounds or if the Unicode version does not have data for the property at all, or not for this code point.
- See Also:
UProperty
public static boolean isBMP(int ch)
Determines if the code point is in the BMP plane.
- Parameters:
ch
- code point to be determined if it is not a supplementary character
- Returns:
- true if code point is not a supplementary character
public static boolean isBaseForm(int ch)
Determines whether the specified code point is of base form. A code point of base form does not graphically combine with preceding characters, and is neither a control nor a format character.
- Parameters:
ch
- code point to be determined if it is of base form
- Returns:
- true if the code point is of base form
public static boolean isDefined(int ch)
Determines if a code point has a defined meaning in the up-to-date Unicode standard. E.g. supplementary code points though allocated space are not defined in Unicode yet.
Up-to-date Unicode implementation of java.lang.Character.isDefined()
- Parameters:
ch
- code point to be determined if it is defined in the most current version of Unicode
- Returns:
- true if this code point is defined in unicode
public static boolean isDigit(int ch)
Determines if a code point is a Java digit.
This method observes the semantics ofjava.lang.Character.isDigit()
. It returns true for decimal digits only.
Semantic Change: In release 1.3.1 and prior, this treated numeric letters and other numbers as digits. This has been changed to conform to the java semantics.
- Parameters:
ch
- code point to query
- Returns:
- true if this code point is a digit
public static boolean isHighSurrogate(char ch)
Cover the JDK 1.5 API, for convenience.
- Parameters:
ch
- the char to check
- Returns:
- true if ch is a high (lead) surrogate
public static boolean isISOControl(int ch)
Determines if the specified code point is an ISO control character. A code point is considered to be an ISO control character if it is in the range \u0000 through \u001F or in the range \u007F through \u009F.
Up-to-date Unicode implementation of java.lang.Character.isISOControl()
- Parameters:
ch
- code point to determine if it is an ISO control character
- Returns:
- true if code point is a ISO control character
public static boolean isIdentifierIgnorable(int ch)
Determines if the specified code point should be regarded as an ignorable character in a Unicode identifier. A character is ignorable in the Unicode standard if it is of the type Cf, Formatting code.
Up-to-date Unicode implementation of java.lang.Character.isIdentifierIgnorable().
See UTR #8.
- Parameters:
ch
- code point to be determined if it can be ignored in a Unicode identifier.
- Returns:
- true if the code point is ignorable
public static boolean isJavaIdentifierPart(int cp)
Compatibility override of Java method, delegates to java.lang.Character.isJavaIdentifierPart.
- Parameters:
cp
- the code point
- Returns:
- true if the code point can continue a java identifier.
public static boolean isJavaIdentifierStart(int cp)
Compatibility override of Java method, delegates to java.lang.Character.isJavaIdentifierStart.
- Parameters:
cp
- the code point
- Returns:
- true if the code point can start a java identifier.
public static boolean isJavaLetter(int cp)
Deprecated. ICU 3.4 (Java)
Compatibility override of Java deprecated method. This method will always remain deprecated. Delegates to java.lang.Character.isJavaIdentifierStart.
- Parameters:
cp
- the code point
- Returns:
- true if the code point can start a java identifier.
public static boolean isJavaLetterOrDigit(int cp)
Deprecated. ICU 3.4 (Java)
Compatibility override of Java deprecated method. This method will always remain deprecated. Delegates to java.lang.Character.isJavaIdentifierPart.
- Parameters:
cp
- the code point
- Returns:
- true if the code point can continue a java identifier.
public static boolean isLegal(String str)
A string is legal iff all its code points are legal. A code point is illegal if and only ifNote: legal does not mean that it is assigned in this version of Unicode.
- Out of bounds, less than 0 or greater than UCharacter.MAX_VALUE
- A surrogate value, 0xD800 to 0xDFFF
- Not-a-character, having the form 0x xxFFFF or 0x xxFFFE
- Parameters:
str
- containing code points to examin
- Returns:
- true if and only if legal.
public static boolean isLegal(int ch)
A code point is illegal if and only ifNote: legal does not mean that it is assigned in this version of Unicode.
- Out of bounds, less than 0 or greater than UCharacter.MAX_VALUE
- A surrogate value, 0xD800 to 0xDFFF
- Not-a-character, having the form 0x xxFFFF or 0x xxFFFE
- Parameters:
ch
- code point to determine if it is a legal code point by itself
- Returns:
- true if and only if legal.
public static boolean isLetter(int ch)
Determines if the specified code point is a letter. Up-to-date Unicode implementation of java.lang.Character.isLetter()
- Parameters:
ch
- code point to determine if it is a letter
- Returns:
- true if code point is a letter
public static boolean isLetterOrDigit(int ch)
Determines if the specified code point is a letter or digit. Note this method, unlike java.lang.Character does not regard the ascii characters 'A' - 'Z' and 'a' - 'z' as digits.
- Parameters:
ch
- code point to determine if it is a letter or a digit
- Returns:
- true if code point is a letter or a digit
public static boolean isLowSurrogate(char ch)
Cover the JDK 1.5 API, for convenience.
- Parameters:
ch
- the char to check
- Returns:
- true if ch is a low (trail) surrogate
public static boolean isLowerCase(int ch)
Determines if the specified code point is a lowercase character. UnicodeData only contains case mappings for code points where they are one-to-one mappings; it also omits information about context-sensitive case mappings.
For more information about Unicode case mapping please refer to the Technical report #21.
Up-to-date Unicode implementation of java.lang.Character.isLowerCase()
- Parameters:
ch
- code point to determine if it is in lowercase
- Returns:
- true if code point is a lowercase character
public static boolean isMirrored(int ch)
Determines whether the code point has the "mirrored" property. This property is set for characters that are commonly used in Right-To-Left contexts and need to be displayed with a "mirrored" glyph.
- Parameters:
ch
- code point whose mirror is to be determined
- Returns:
- true if the code point has the "mirrored" property
public static boolean isPrintable(int ch)
Determines whether the specified code point is a printable character according to the Unicode standard.
- Parameters:
ch
- code point to be determined if it is printable
- Returns:
- true if the code point is a printable character
public static boolean isSpace(int ch)
Deprecated. ICU 3.4 (Java)
Compatibility override of Java deprecated method. This method will always remain deprecated. Delegates to java.lang.Character.isSpace.
- Parameters:
ch
- the code point
- Returns:
- true if the code point is a space character as defined by java.lang.Character.isSpace.
public static boolean isSpaceChar(int ch)
Determines if the specified code point is a Unicode specified space character, i.e. if code point is in the category Zs, Zl and Zp. Up-to-date Unicode implementation of java.lang.Character.isSpaceChar().
- Parameters:
ch
- code point to determine if it is a space
- Returns:
- true if the specified code point is a space character
public static boolean isSupplementary(int ch)
Determines if the code point is a supplementary character. A code point is a supplementary character if and only if it is greater than SUPPLEMENTARY_MIN_VALUE
- Parameters:
ch
- code point to be determined if it is in the supplementary plane
- Returns:
- true if code point is a supplementary character
public static final boolean isSupplementaryCodePoint(int cp)
Cover the JDK 1.5 API, for convenience.
- Parameters:
cp
- the code point to check
- Returns:
- true if cp is a supplementary code point
public static final boolean isSurrogatePair(char high, char low)
Cover the JDK 1.5 API, for convenience. Return true if the chars form a valid surrogate pair.
- Parameters:
high
- the high (lead) charlow
- the low (trail) char
- Returns:
- true if high, low form a surrogate pair
public static boolean isTitleCase(int ch)
Determines if the specified code point is a titlecase character. UnicodeData only contains case mappings for code points where they are one-to-one mappings; it also omits information about context-sensitive case mappings.
For more information about Unicode case mapping please refer to the Technical report #21.
Up-to-date Unicode implementation of java.lang.Character.isTitleCase().
- Parameters:
ch
- code point to determine if it is in title case
- Returns:
- true if the specified code point is a titlecase character
public static boolean isUAlphabetic(int ch)
Check if a code point has the Alphabetic Unicode property. Same as UCharacter.hasBinaryProperty(ch, UProperty.ALPHABETIC). Different from UCharacter.isLetter(ch)!
- Parameters:
ch
- codepoint to be tested
public static boolean isULowercase(int ch)
Check if a code point has the Lowercase Unicode property. Same as UCharacter.hasBinaryProperty(ch, UProperty.LOWERCASE). This is different from UCharacter.isLowerCase(ch)!
- Parameters:
ch
- codepoint to be tested
public static boolean isUUppercase(int ch)
Check if a code point has the Uppercase Unicode property. Same as UCharacter.hasBinaryProperty(ch, UProperty.UPPERCASE). This is different from UCharacter.isUpperCase(ch)!
- Parameters:
ch
- codepoint to be tested
public static boolean isUWhiteSpace(int ch)
Check if a code point has the White_Space Unicode property. Same as UCharacter.hasBinaryProperty(ch, UProperty.WHITE_SPACE). This is different from both UCharacter.isSpace(ch) and UCharacter.isWhitespace(ch)!
- Parameters:
ch
- codepoint to be tested
public static boolean isUnicodeIdentifierPart(int ch)
Determines if the specified code point may be any part of a Unicode identifier other than the starting character. A code point may be part of a Unicode identifier if and only if it is one of the following:Up-to-date Unicode implementation of java.lang.Character.isUnicodeIdentifierPart().
- Lu Uppercase letter
- Ll Lowercase letter
- Lt Titlecase letter
- Lm Modifier letter
- Lo Other letter
- Nl Letter number
- Pc Connecting punctuation character
- Nd decimal number
- Mc Spacing combining mark
- Mn Non-spacing mark
- Cf formatting code
See UTR #8.
- Parameters:
ch
- code point to determine if is can be part of a Unicode identifier
- Returns:
- true if code point is any character belonging a unicode identifier suffix after the first character
public static boolean isUnicodeIdentifierStart(int ch)
Determines if the specified code point is permissible as the first character in a Unicode identifier. A code point may start a Unicode identifier if it is of type eitherUp-to-date Unicode implementation of java.lang.Character.isUnicodeIdentifierStart().
- Lu Uppercase letter
- Ll Lowercase letter
- Lt Titlecase letter
- Lm Modifier letter
- Lo Other letter
- Nl Letter number
See UTR #8.
- Parameters:
ch
- code point to determine if it can start a Unicode identifier
- Returns:
- true if code point is the first character belonging a unicode identifier
public static boolean isUpperCase(int ch)
Determines if the specified code point is an uppercase character. UnicodeData only contains case mappings for code point where they are one-to-one mappings; it also omits information about context-sensitive case mappings.
For language specific case conversion behavior, use toUpperCase(locale, str).
For example, the case conversion for dot-less i and dotted I in Turkish, or for final sigma in Greek. For more information about Unicode case mapping please refer to the Technical report #21.
Up-to-date Unicode implementation of java.lang.Character.isUpperCase().
- Parameters:
ch
- code point to determine if it is in uppercase
- Returns:
- true if the code point is an uppercase character
public static final boolean isValidCodePoint(int cp)
Cover the JDK 1.5 API, for convenience.
- Parameters:
cp
- the code point to check
- Returns:
- true if cp is a valid code point
public static boolean isWhitespace(int ch)
Determines if the specified code point is a white space character. A code point is considered to be an whitespace character if and only if it satisfies one of the following criteria:This API tries to synch to the semantics of the Java API, java.lang.Character.isWhitespace().
- It is a Unicode space separator (category "Zs"), but is not a no-break space (\u00A0 or \u202F or \uFEFF).
- It is a Unicode line separator (category "Zl").
- It is a Unicode paragraph separator (category "Zp").
- It is \u0009, HORIZONTAL TABULATION.
- It is \u000A, LINE FEED.
- It is \u000B, VERTICAL TABULATION.
- It is \u000C, FORM FEED.
- It is \u000D, CARRIAGE RETURN.
- It is \u001C, FILE SEPARATOR.
- It is \u001D, GROUP SEPARATOR.
- It is \u001E, RECORD SEPARATOR.
- It is \u001F, UNIT SEPARATOR.
- Parameters:
ch
- code point to determine if it is a white space
- Returns:
- true if the specified code point is a white space character
public static int offsetByCodePoints(CharSequence text, int index, int codePointOffset)
Cover the JDK API, for convenience. Adjust the char index by a code point offset.
- Parameters:
text
- the characters to checkindex
- the index to adjustcodePointOffset
- the number of code points by which to offset the index
- Returns:
- the adjusted index
public static int offsetByCodePoints(char[] text, int start, int count, int index, int codePointOffset)
Cover the JDK API, for convenience. Adjust the char index by a code point offset.
- Parameters:
text
- the characters to checkstart
- the start of the range to checkcount
- the length of the range to checkindex
- the index to adjustcodePointOffset
- the number of code points by which to offset the index
- Returns:
- the adjusted index
public static final char[] toChars(int cp)
Cover the JDK 1.5 API, for convenience. Returns a char array representing the code point.
- Parameters:
cp
- the code point to convert
- Returns:
- an array containing the char(s) representing the code point
public static final int toChars(int cp, char[] dst, int dstIndex)
Cover the JDK 1.5 API, for convenience. Writes the chars representing the code point into the destination at the given index.
- Parameters:
cp
- the code point to convertdst
- the destination array into which to put the char(s) representing the code pointdstIndex
- the index at which to put the first (or only) char
- Returns:
- the count of the number of chars written (1 or 2)
public static final int toCodePoint(char high, char low)
Cover the JDK 1.5 API, for convenience. Return the code point represented by the characters. This does not check the surrogate pair for validity.
- Parameters:
high
- the high (lead) surrogatelow
- the low (trail) surrogate
- Returns:
- the code point formed by the surrogate pair
public static String toLowerCase(Locale locale, String str)
Gets lowercase version of the argument string. Casing is dependent on the argument locale and context-sensitive
- Parameters:
locale
- which string is to be converted instr
- source string to be performed on
- Returns:
- lowercase version of the argument string
public static String toLowerCase(String str)
Gets lowercase version of the argument string. Casing is dependent on the default locale and context-sensitive
- Parameters:
str
- source string to be performed on
- Returns:
- lowercase version of the argument string
public static String toLowerCase(ULocale locale, String str)
Gets lowercase version of the argument string. Casing is dependent on the argument locale and context-sensitive
- Parameters:
locale
- which string is to be converted instr
- source string to be performed on
- Returns:
- lowercase version of the argument string
public static int toLowerCase(int ch)
The given code point is mapped to its lowercase equivalent; if the code point has no lowercase equivalent, the code point itself is returned. Up-to-date Unicode implementation of java.lang.Character.toLowerCase() This function only returns the simple, single-code point case mapping. Full case mappings should be used whenever possible because they produce better results by working on whole strings. They take into account the string context and the language and can map to a result string with a different length as appropriate. Full case mappings are applied by the case mapping functions that take String parameters rather than code points (int). See also the User Guide chapter on C/POSIX migration: http://icu.sourceforge.net/userguide/posix.html#case_mappings
- Parameters:
ch
- code point whose lowercase equivalent is to be retrieved
- Returns:
- the lowercase equivalent code point
public static String toString(int ch)
Converts argument code point and returns a String object representing the code point's value in UTF16 format. The result is a string whose length is 1 for non-supplementary code points, 2 otherwise.
com.ibm.ibm.icu.UTF16 can be used to parse Strings generated by this function.
Up-to-date Unicode implementation of java.lang.Character.toString()
- Parameters:
ch
- code point
- Returns:
- string representation of the code point, null if code point is not defined in unicode
public static String toTitleCase(Locale locale, String str, BreakIterator breakiter)
Gets the titlecase version of the argument string. Position for titlecasing is determined by the argument break iterator, hence the user can customized his break iterator for a specialized titlecasing. In this case only the forward iteration needs to be implemented. If the break iterator passed in is null, the default Unicode algorithm will be used to determine the titlecase positions. Only positions returned by the break iterator will be title cased, character in between the positions will all be in lower case. Casing is dependent on the argument locale and context-sensitive
- Parameters:
locale
- which string is to be converted instr
- source string to be performed onbreakiter
- break iterator to determine the positions in which the character should be title cased.
- Returns:
- lowercase version of the argument string
public static String toTitleCase(String str, BreakIterator breakiter)
Gets the titlecase version of the argument string. Position for titlecasing is determined by the argument break iterator, hence the user can customized his break iterator for a specialized titlecasing. In this case only the forward iteration needs to be implemented. If the break iterator passed in is null, the default Unicode algorithm will be used to determine the titlecase positions. Only positions returned by the break iterator will be title cased, character in between the positions will all be in lower case. Casing is dependent on the default locale and context-sensitive
- Parameters:
str
- source string to be performed onbreakiter
- break iterator to determine the positions in which the character should be title cased.
- Returns:
- lowercase version of the argument string
public static String toTitleCase(ULocale locale, String str, BreakIterator titleIter)
Gets the titlecase version of the argument string. Position for titlecasing is determined by the argument break iterator, hence the user can customized his break iterator for a specialized titlecasing. In this case only the forward iteration needs to be implemented. If the break iterator passed in is null, the default Unicode algorithm will be used to determine the titlecase positions. Only positions returned by the break iterator will be title cased, character in between the positions will all be in lower case. Casing is dependent on the argument locale and context-sensitive
- Parameters:
locale
- which string is to be converted instr
- source string to be performed ontitleIter
- break iterator to determine the positions in which the character should be title cased.
- Returns:
- lowercase version of the argument string
public static int toTitleCase(int ch)
Converts the code point argument to titlecase. If no titlecase is available, the uppercase is returned. If no uppercase is available, the code point itself is returned. Up-to-date Unicode implementation of java.lang.Character.toTitleCase() This function only returns the simple, single-code point case mapping. Full case mappings should be used whenever possible because they produce better results by working on whole strings. They take into account the string context and the language and can map to a result string with a different length as appropriate. Full case mappings are applied by the case mapping functions that take String parameters rather than code points (int). See also the User Guide chapter on C/POSIX migration: http://icu.sourceforge.net/userguide/posix.html#case_mappings
- Parameters:
ch
- code point whose title case is to be retrieved
- Returns:
- titlecase code point
public static String toUpperCase(Locale locale, String str)
Gets uppercase version of the argument string. Casing is dependent on the argument locale and context-sensitive.
- Parameters:
locale
- which string is to be converted instr
- source string to be performed on
- Returns:
- uppercase version of the argument string
public static String toUpperCase(String str)
Gets uppercase version of the argument string. Casing is dependent on the default locale and context-sensitive.
- Parameters:
str
- source string to be performed on
- Returns:
- uppercase version of the argument string
public static String toUpperCase(ULocale locale, String str)
Gets uppercase version of the argument string. Casing is dependent on the argument locale and context-sensitive.
- Parameters:
locale
- which string is to be converted instr
- source string to be performed on
- Returns:
- uppercase version of the argument string
public static int toUpperCase(int ch)
Converts the character argument to uppercase. If no uppercase is available, the character itself is returned. Up-to-date Unicode implementation of java.lang.Character.toUpperCase() This function only returns the simple, single-code point case mapping. Full case mappings should be used whenever possible because they produce better results by working on whole strings. They take into account the string context and the language and can map to a result string with a different length as appropriate. Full case mappings are applied by the case mapping functions that take String parameters rather than code points (int). See also the User Guide chapter on C/POSIX migration: http://icu.sourceforge.net/userguide/posix.html#case_mappings
- Parameters:
ch
- code point whose uppercase is to be retrieved
- Returns:
- uppercase code point