Data Structures

Here are the data structures with brief descriptions:

[detail level 12]

AlphabeticIndex	Class AlphabeticIndex supports the creation of a UI index appropriate for a given language, such as:
Bucket	A Bucket holds an index label and references to everything belonging to that label
Record	A record, or item, in the index
AnnualTimeZoneRule	AnnualTimeZoneRule is a class used for representing a time zone rule which takes effect annually
Appendable	Base class for objects to which Unicode characters and strings can be appended
BasicTimeZone	BasicTimeZone is an abstract class extending TimeZone
BoyerMooreSearch	BoyerMooreSearch
BreakIterator	Implements methods for finding the location of boundaries in text
ByteSink	A ByteSink can be filled with bytes
BytesTrie	Light-weight, non-const reader class for a BytesTrie
Iterator	Iterator for all of the (byte sequence, value) pairs in a BytesTrie
State	BytesTrie state object, for saving a trie's current state and resetting the trie back to this state later
BytesTrieBuilder	Builder class for BytesTrie
Calendar	Calendar is an abstract base class for converting between a UDate object and a set of integer fields such as YEAR, MONTH, DAY, HOUR, and so on
CanonicalIterator	This class allows one to iterate through all the strings that are canonically equivalent to a given string
CEList	This object holds a list of CEs generated from a particular UnicodeString
CharacterIterator	Abstract class that defines an API for iteration on text objects
CheckedArrayByteSink	Implementation of ByteSink that writes to a flat byte array, with bounds-checking: This sink will not write more than capacity bytes to outbuf
ChoiceFormat	ChoiceFormat converts between ranges of numeric values and strings for those ranges
CollationElementIterator	Used as an iterator to walk through each character of an international string
CollationKey	Collation keys are generated by the Collator class
Collator	The Collator class performs locale-sensitive string comparison
CollatorFactory	A factory, used with registerFactory, the creates multiple collators and provides display names for them
CollData	CollData
CurrencyAmount	A currency together with a numeric amount, such as 200 USD
CurrencyPluralInfo	This class represents the information needed by DecimalFormat to format currency plural, such as "3.00 US dollars" or "1.00 US dollar"
CurrencyUnit	A unit of currency, such as USD (U.S
DateFormat	DateFormat is an abstract class for a family of classes that convert dates and times from their internal representations to textual form and back again in a language-independent manner
DateFormatSymbols	DateFormatSymbols is a public class for encapsulating localizable date-time formatting data – including timezone data
DateInterval	This class represents a date interval
DateIntervalFormat	DateIntervalFormat is a class for formatting and parsing date intervals in a language-independent manner
DateIntervalInfo	DateIntervalInfo is a public class for encapsulating localizable date time interval patterns
DateTimePatternGenerator	This class provides flexible generation of date format patterns, like "yy-MM-dd"
DateTimeRule	DateTimeRule is a class representing a time in a year by a rule specified by month, day of month, day of week and time in the day
DecimalFormat	DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers
DecimalFormatSymbols	This class represents the set of symbols needed by DecimalFormat to format numbers
ErrorCode	Wrapper class for UErrorCode, with conversion operators for direct use in ICU C and C++ APIs
FieldPosition	FieldPosition is a simple class used by Format and its subclasses to identify fields in formatted output
FieldPositionIterator	FieldPositionIterator returns the field ids and their start/limit positions generated by a call to Format::format
FilteredNormalizer2	Normalization filtered by a UnicodeSet
FontRuns	The FontRuns class associates pointers to LEFontInstance objects with runs of text
Format	Base class for all formats
Formattable	Formattable objects can be passed to the Format class or its subclasses for formatting
ForwardCharacterIterator	Abstract class that defines an API for forward-only iteration on text objects
GregorianCalendar	Concrete class which provides the standard calendar used by most of the world
IDNA	Abstract base class for IDNA processing
IDNAInfo	Output container for IDNA processing errors
InitialTimeZoneRule	InitialTimeZoneRule represents a time zone rule representing a time zone effective from the beginning and has no actual start times
LayoutEngine	This is a virtual base class used to do complex text layout
LECharMapper	Instances of this class are used by LEFontInstance::mapCharsToGlyphs and LEFontInstance::mapCharToGlyph to adjust character codes before the character to glyph mapping process
LEFontInstance	This is a virtual base class that serves as the interface between a LayoutEngine and the platform font environment
LEGlyphStorage	This class encapsulates the per-glyph storage used by the ICU LayoutEngine
LEPoint	Used to hold a pair of (x, y) values which represent a point
LESwaps	This class is used to access data which stored in big endian order regardless of the conventions of the platform
Locale	A Locale object represents a specific geographical, political, or cultural region
LocaleDisplayNames	Returns display names of Locales and components of Locales
LocaleRuns	The LocaleRuns class associates pointers to Locale objects with runs of text
Measure	An amount of a specified unit, consisting of a number and a Unit
MeasureFormat	A formatter for measure objects
MeasureUnit	A unit such as length, mass, volume, currency, etc
MessageFormat
MessagePattern	Parses and represents ICU MessageFormat patterns
Part	A message pattern "part", representing a pattern parsing event
Normalizer	Supports the standard normalization forms described in Unicode Standard Annex #15: Unicode Normalization Forms
Normalizer2	Unicode normalization functionality for standard Unicode normalization or for using custom mapping tables
NumberFormat	Abstract base class for all number formats
NumberFormatFactory	A NumberFormatFactory is used to register new number formats
NumberingSystem	Defines numbering systems
ParagraphLayout	ParagraphLayout
Line	This class represents a single line of text in a ParagraphLayout
VisualRun	This object represents a single visual run in a line of text in a paragraph
ParsePosition	ParsePosition is a simple class used by Format and its subclasses to keep track of the current position during parsing
PluralFormat
PluralRules	Defines rules for mapping non-negative numeric values onto a small set of keywords
RegexMatcher	Class RegexMatcher bundles together a regular expression pattern and input text to which the expression can be applied
RegexPattern	Class RegexPattern represents a compiled regular expression
Replaceable	Replaceable is an abstract base class representing a string of characters that supports the replacement of a range of itself with a new string of characters
ResourceBundle	A class representing a collection of resource information pertaining to a given locale
RuleBasedBreakIterator	A subclass of BreakIterator whose behavior is specified using a list of rules
RuleBasedCollator	Simple implementation of Collator, using data-driven tables
RuleBasedNumberFormat	Formats numbers according to a set of rules
RuleBasedTimeZone	BasicTimeZone subclass implemented in terms of InitialTimeZoneRule and TimeZoneRule instances
RunArray	The RunArray class is a base class for building classes which represent data that is associated with runs of text
SearchIterator	SearchIterator is an abstract base class that provides methods to search for a pattern within a text string
SelectFormat
SimpleDateFormat	SimpleDateFormat is a concrete class for formatting and parsing dates in a language-independent manner
SimpleNumberFormatFactory	A NumberFormatFactory that supports a single locale
SimpleTimeZone	SimpleTimeZone is a concrete subclass of TimeZone that represents a time zone for use with a Gregorian calendar
StringCharacterIterator	A concrete subclass of CharacterIterator that iterates over the characters (code units or code points) in a UnicodeString
StringEnumeration	Base class for 'pure' C++ implementations of uenum api
StringList	StringList
StringPiece	A string-like object that points to a sized piece of memory
StringSearch	<tt>StringSearch</tt> is a <tt>SearchIterator</tt> that provides language-sensitive text searching based on the comparison rules defined in a RuleBasedCollator object
StringTrieBuilder	Base class for string trie builder classes
BranchHeadNode
BranchNode
FinalValueNode
IntermediateValueNode
LinearMatchNode
ListBranchNode
Node
SplitBranchNode
ValueNode
SymbolTable	An interface that defines both lookup protocol and parsing of symbolic names
TimeArrayTimeZoneRule	TimeArrayTimeZoneRule represents a time zone rule whose start times are defined by an array of milliseconds since the standard base time
TimeUnit	Measurement unit for time units
TimeUnitAmount	Express a duration as a time unit and number
TimeUnitFormat	Format or parse a TimeUnitAmount, using plural rules for the units where available
TimeZone	TimeZone represents a time zone offset, and also figures out daylight savings
TimeZoneRule	TimeZoneRule is a class representing a rule for time zone
TimeZoneTransition	TimeZoneTransition is a class representing a time zone transition
Transliterator	Transliterator is an abstract class that transliterates text from one format to another
Token	A context integer or pointer for a factory function, passed by value
UCharCharacterIterator	A concrete subclass of CharacterIterator that iterates over the characters (code units or code points) in a UChar array
UCharIterator	C API for code unit iteration
UCharsTrie	Light-weight, non-const reader class for a UCharsTrie
Iterator	Iterator for all of the (string, value) pairs in a UCharsTrie
State	UCharsTrie state object, for saving a trie's current state and resetting the trie back to this state later
UCharsTrieBuilder	Builder class for UCharsTrie
UConverterFromUnicodeArgs	The structure for the fromUnicode callback function parameter
UConverterToUnicodeArgs	The structure for the toUnicode callback function parameter
UDataInfo	UDataInfo contains the properties about the requested data
UFieldPosition	A struct representing a range of text containing a specific field
UIDNAInfo	Output container for IDNA processing errors
UMemory	UMemory is the common ICU base class
UnicodeFilter	UnicodeFilter defines a protocol for selecting a subset of the full range (U+0000 to U+10FFFF) of Unicode characters
UnicodeFunctor	UnicodeFunctor is an abstract base class for objects that perform match and/or replace operations on Unicode strings
UnicodeMatcher	UnicodeMatcher defines a protocol for objects that can match a range of characters in a Replaceable string
UnicodeReplacer	UnicodeReplacer defines a protocol for objects that replace a range of characters in a Replaceable string with output text
UnicodeSet	A mutable set of Unicode characters and multicharacter strings
UnicodeSetIterator	UnicodeSetIterator iterates over the contents of a UnicodeSet
UnicodeString	UnicodeString is a string class that stores Unicode characters directly and provides similar functionality as the Java String and StringBuffer classes
UnicodeStringAppendable	An Appendable implementation which writes to a UnicodeString
UObject	UObject is the common ICU "boilerplate" class
UParseError	A UParseError struct is used to returned detailed information about parsing errors
UReplaceableCallbacks	A set of function pointers that transliterators use to manipulate a UReplaceable
USerializedSet	A serialized form of a Unicode set
UText	UText struct
UTextFuncs	(public) Function dispatch table for UText
UTransPosition	Position structure for utrans_transIncremental() incremental transliteration
ValueRuns	The ValueRuns class associates integer values with runs of text
VTimeZone	VTimeZone is a class implementing RFC2445 VTIMEZONE