Statistics for java.util Package Quiz

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General Stats
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General Stats

This quiz has been taken 5 times
The average score is 1 of 128

Answer Stats

Group	Description	Name	% Correct
Class	A simple text scanner which can parse primitive types and strings using regular expressions.	Scanner	75%
Class	This class consists exclusively of static methods that operate on or return collections.	Collections	25%
Class	This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface.	AbstractCollection<E>	0%
Class	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).	AbstractList<E>	0%
Class	This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface.	AbstractMap<K,V>	0%
Class	An Entry maintaining a key and a value.	AbstractMap.SimpleEntry<K,V>	0%
Class	An Entry maintaining an immutable key and value.	AbstractMap.SimpleImmutableEntry<K,V>	0%
Class	This class provides skeletal implementations of some Queue operations.	AbstractQueue<E>	0%
Class	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list).	AbstractSequentialList<E>	0%
Class	This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.	AbstractSet<E>	0%
Class	Resizable-array implementation of the Deque interface.	ArrayDeque<E>	0%
Class	Resizable-array implementation of the List interface.	ArrayList<E>	0%
Class	This class contains various methods for manipulating arrays (such as sorting and searching).	Arrays	0%
Class	This class consists exclusively of static methods for obtaining encoders and decoders for the Base64 encoding scheme.	Base64	0%
Class	This class implements a decoder for decoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.	Base64.Decoder	0%
Class	This class implements an encoder for encoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.	Base64.Encoder	0%
Class	This class implements a vector of bits that grows as needed.	BitSet	0%
Class	This class is an abstract class that provides methods for converting between a specific instant in time and a set of calendar fields such as YEAR, MONTH, DAY_OF_MONTH, HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.	Calendar	0%
Class	This is used for creating a Calendar from various date-time parameters.	Calendar.Builder	0%
Interface	The root interface in the collection hierarchy.	Collection<E>	0%
Interface	A comparison function, which imposes a total ordering on some collection of objects.	Comparator<T>	0%
Exception	This exception may be thrown by methods that have detected concurrent modification of an object when such modification is not permissible.	ConcurrentModificationException	0%
Class	Represents a currency.	Currency	0%
Class	This class represents a specific instant in time, with millisecond precision.	Date	0%
Interface	A linear collection that supports element insertion and removal at both ends.	Deque<E>	0%
Class	This class is the abstract parent of any class, such as Hashtable, which maps keys to values.	Dictionary<K,V>	0%
Class	A state object for collecting statistics such as count, min, max, sum, and average.	DoubleSummaryStatistics	0%
Exception	Unchecked exception thrown when duplicate flags are provided in the format specifier.	DuplicateFormatFlagsException	0%
Exception	Thrown by methods in the Stack class to indicate that the stack is empty.	EmptyStackException	0%
Interface	An object that implements this interface generates a series of elements, one at a time.	Enumeration<E>	0%
Class	A specialized Map implementation for use with enum type keys.	EnumMap<K extends Enum<K>,V>	0%
Class	A specialized Set implementation for use with enum types.	EnumSet<E extends Enum<E>>	0%
Interface	A tagging interface that all event listener interfaces must extend.	EventListener	0%
Class	An abstract wrapper class for an EventListener class which associates a set of additional parameters with the listener.	EventListenerProxy<T extends EventListener>	0%
Class	The root class from which all event state objects shall be derived.	EventObject	0%
Exception	Unchecked exception thrown when a conversion and flag are incompatible.	FormatFlagsConversionMismatchException	0%
Interface	This interface must be implemented by any class that needs to perform custom formatting using the 's' conversion specifier of Formatter.	Formattable	0%
Class	FomattableFlags are passed to the Formattable.formatTo() method and modify the output format for Formattables.	FormattableFlags	0%
Class	An interpreter for printf-style format strings.	Formatter	0%
Enum	Enum for BigDecimal formatting.	Formatter.BigDecimalLayoutForm	0%
Exception	Unchecked exception thrown when the formatter has been closed.	FormatterClosedException	0%
Class	This is a concrete subclass of Calendar and provides the standard calendar system used by most of the world.	GregorianCalendar	0%
Class	Hash table based implementation of the Map interface.	HashMap<K,V>	0%
Class	This class implements the Set interface, backed by a hash table (actually a HashMap instance).	HashSet<E>	0%
Class	This class implements a hash table, which maps keys to values.	Hashtable<K,V>	0%
Class	This class implements the Map interface with a hash table, using reference-equality in place of object-equality when comparing keys (and values).	IdentityHashMap<K,V>	0%
Exception	Unchecked exception thrown when a character with an invalid Unicode code point as defined by Character.isValidCodePoint(int) is passed to the Formatter.	IllegalFormatCodePointException	0%
Exception	Unchecked exception thrown when the argument corresponding to the format specifier is of an incompatible type.	IllegalFormatConversionException	0%
Exception	Unchecked exception thrown when a format string contains an illegal syntax or a format specifier that is incompatible with the given arguments.	IllegalFormatException	0%
Exception	Unchecked exception thrown when an illegal combination flags is given.	IllegalFormatFlagsException	0%
Exception	Unchecked exception thrown when the precision is a negative value other than -1, the conversion does not support a precision, or the value is otherwise unsupported.	IllegalFormatPrecisionException	0%
Exception	Unchecked exception thrown when the format width is a negative value other than -1 or is otherwise unsupported.	IllegalFormatWidthException	0%
Exception	Thrown by methods in Locale and Locale.Builder to indicate that an argument is not a well-formed BCP 47 tag.	IllformedLocaleException	0%
Exception	Thrown by a Scanner to indicate that the token retrieved does not match the pattern for the expected type, or that the token is out of range for the expected type.	InputMismatchException	0%
Class	A state object for collecting statistics such as count, min, max, sum, and average.	IntSummaryStatistics	0%
Exception	Thrown to indicate that an operation could not complete because the input did not conform to the appropriate XML document type for a collection of properties, as per the Properties specification.	InvalidPropertiesFormatException	0%
Interface	An iterator over a collection.	Iterator<E>	0%
Class	Hash table and linked list implementation of the Map interface, with predictable iteration order.	LinkedHashMap<K,V>	0%
Class	Hash table and linked list implementation of the Set interface, with predictable iteration order.	LinkedHashSet<E>	0%
Class	Doubly-linked list implementation of the List and Deque interfaces.	LinkedList<E>	0%
Interface	An iterator for lists that allows the programmer to traverse the list in either direction, modify the list during iteration, and obtain the iterator's current position in the list.	ListIterator<E>	0%
Interface	An ordered collection (also known as a sequence).	List<E>	0%
Class	This is an abstract subclass of ResourceBundle that manages resources for a locale in a convenient and easy to use list.	ListResourceBundle	0%
Class	This object represents a specific geographical, political, or cultural region.	Locale	0%
Class	This class expresses a Language Range defined in RFC 4647 Matching of Language Tags.	Locale.Builder	0%
Enum	Enum for locale categories.	Locale.Category	0%
Enum	This enum provides constants to select a filtering mode for locale matching.	Locale.FilteringMode	0%
Class	Builder is used to build instances of Locale from values configured by the setters.	Locale.LanguageRange	0%
Class	A state object for collecting statistics such as count, min, max, sum, and average.	LongSummaryStatistics	0%
Interface	A map entry (key-value pair).	Map.Entry<K,V>	0%
Interface	An object that maps keys to values.	Map<K,V>	0%
Exception	Unchecked exception thrown when there is a format specifier which does not have a corresponding argument or if an argument index refers to an argument that does not exist.	MissingFormatArgumentException	0%
Exception	Unchecked exception thrown when the format width is required.	MissingFormatWidthException	0%
Exception	Signals that a resource is missing.	MissingResourceException	0%
Interface	A SortedMap extended with navigation methods returning the closest matches for given search targets.	NavigableMap<K,V>	0%
Interface	A SortedSet extended with navigation methods reporting closest matches for given search targets.	NavigableSet<E>	0%
Exception	Thrown by various accessor methods to indicate that the element being requested does not exist.	NoSuchElementException	0%
Class	This class consists of static utility methods for operating on objects.	Objects	0%
Class	This class represents an observable object, or "data" in the model-view paradigm.	Observable	0%
Interface	A class can implement this interface when it wants to be informed of changes in observable objects.	Observer	0%
Class	A container object which may or may not contain a double value.	OptionalDouble	0%
Class	A container object which may or may not contain a int value.	OptionalInt	0%
Class	A container object which may or may not contain a long value.	OptionalLong	0%
Class	A container object which may or may not contain a non-null value.	Optional<T>	0%
Interface	A base type for primitive specializations of Iterator.	PrimitiveIterator<T,T_CONS>	0%
Interface	An Iterator specialized for double values.	PrimitiveIterator.OfDouble	0%
Interface	An Iterator specialized for int values.	PrimitiveIterator.OfInt	0%
Interface	An Iterator specialized for long values.	PrimitiveIterator.OfLong	0%
Class	An unbounded priority queue based on a priority heap.	PriorityQueue<E>	0%
Class	This class represents a persistent set of properties.	Properties	0%
Class	This class is for property permissions.	PropertyPermission	0%
Class	This is a concrete subclass of ResourceBundle that manages resources for a locale using a set of static strings from a property file.	PropertyResourceBundle	0%
Interface	A collection designed for holding elements prior to processing.	Queue<E>	0%
Class	An instance of this class is used to generate a stream of pseudorandom numbers.	Random	0%
Interface	Marker interface used by List implementations to indicate that they support fast (generally constant time) random access.	RandomAccess	0%
Class	Resource bundles contain locale-specific objects.	ResourceBundle	0%
Class	This defines a set of callback methods that are invoked by the ResourceBundle.getBundle factory methods during the bundle loading process.	ResourceBundle.Control	0%
Error	Error thrown when something goes wrong while loading a service provider.	ServiceConfigurationError	0%
Class	A simple service-provider loading facility.	ServiceLoader<S>	0%
Interface	A collection that contains no duplicate elements.	Set<E>	0%
Class	This is a concrete subclass of TimeZone that represents a time zone for use with a Gregorian calendar.	SimpleTimeZone	0%
Interface	A Map that further provides a total ordering on its keys.	SortedMap<K,V>	0%
Interface	A Set that further provides a total ordering on its elements.	SortedSet<E>	0%
Interface	An object for traversing and partitioning elements of a source.	Spliterator<T>	0%
Interface	A Spliterator specialized for double values.	Spliterator.OfDouble	0%
Interface	A Spliterator specialized for int values.	Spliterator.OfInt	0%
Interface	A Spliterator specialized for long values.	Spliterator.OfLong	0%
Interface	A Spliterator specialized for primitive values.	Spliterator.OfPrimitive<T,T_CONS,T_SPLITR extends Spliterator.OfPrimitive<T,T_CONS,T_SPLITR>>	0%
Class	Static classes and methods for operating on or creating instances of Spliterator and its primitive specializations Spliterator.OfInt, Spliterator.OfLong, and Spliterator.OfDouble.	Spliterators	0%
Class	An abstract Spliterator.OfDouble that implements trySplit to permit limited parallelism.	Spliterators.AbstractDoubleSpliterator	0%
Class	An abstract Spliterator.OfInt that implements trySplit to permit limited parallelism.	Spliterators.AbstractIntSpliterator	0%
Class	An abstract Spliterator.OfLong that implements trySplit to permit limited parallelism.	Spliterators.AbstractLongSpliterator	0%
Class	An abstract Spliterator that implements trySplit to permit limited parallelism.	Spliterators.AbstractSpliterator<T>	0%
Class	A generator of uniform pseudorandom values applicable for use in (among other contexts) isolated parallel computations that may generate subtasks.	SplittableRandom	0%
Class	This class represents a last-in-first-out (LIFO) stack of objects.	Stack<E>	0%
Class	StringJoiner is used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix.	StringJoiner	0%
Class	The string tokenizer class allows an application to break a string into tokens.	StringTokenizer	0%
Class	A facility for threads to schedule tasks for future execution in a background thread.	Timer	0%
Class	A task that can be scheduled for one-time or repeated execution by a Timer.	TimerTask	0%
Class	TimeZone represents a time zone offset, and also figures out daylight savings.	TimeZone	0%
Exception	This Exception is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source.	TooManyListenersException	0%
Class	A Red-Black tree based NavigableMap implementation.	TreeMap<K,V>	0%
Class	A NavigableSet implementation based on a TreeMap.	TreeSet<E>	0%
Exception	Unchecked exception thrown when an unknown conversion is given.	UnknownFormatConversionException	0%
Exception	Unchecked exception thrown when an unknown flag is given.	UnknownFormatFlagsException	0%
Class	A class that represents an immutable universally unique identifier (UUID).	UUID	0%
Class	This class implements a growable array of objects.	Vector<E>	0%
Class	Hash table based implementation of the Map interface, with weak keys.	WeakHashMap<K,V>	0%