A C D E F G H I L M N O P Q R S T U V W X Y

A

AbstractQueenPuzzle - Class in net.sourceforge.domian.test.benchmark

AbstractQueenPuzzle(AbstractQueenPuzzle.RepositoryType, long, int, long) - Constructor for class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

AbstractQueenPuzzle.RepositoryType - Enum in net.sourceforge.domian.test.benchmark

AbstractQueenPuzzle.RepositoryType() - Constructor for enum net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle.RepositoryType

addOneWellKnownSuccessfulQueenPuzzleConstellationInto(Repository<QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

Adding correct constellation (A1, B5, C8, D6, E3, F7, G2, H4)

and(Specification<? super QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

C

C - Variable in class net.sourceforge.domian.test.combinatorics.Combination

C(int, int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Calculates the number of combinations (math:"n over m") of n elements chosen from a list of m elements.

calculateTotalNumberOfSequences() - Method in class net.sourceforge.domian.test.combinatorics.Combination

calculateTotalNumberOfSequences() - Method in class net.sourceforge.domian.test.combinatorics.Permutation

calculateTotalNumberOfSequences() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

check(int, int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Checks that 0 <= n <= m.

CHESSBOARD_DIMENSIONS - Static variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

CHESSBOARD_DIMENSIONS - Static variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

CHESSBOARD_SIZE - Static variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

CHESSBOARD_SIZE - Static variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

ChessPiecePlacing - Class in net.sourceforge.domian.test.benchmark

Immutable chess piece placing value class.

ChessPiecePlacing(int, int) - Constructor for class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

ChessPiecePlacing(int) - Constructor for class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

Combination - Class in net.sourceforge.domian.test.combinatorics

This class generates a list with number combinations according to a given length, n, and number of elements, m.

Combination(int) - Constructor for class net.sourceforge.domian.test.combinatorics.Combination

Combination(int, int) - Constructor for class net.sourceforge.domian.test.combinatorics.Combination

Combinatorics - Class in net.sourceforge.domian.test.combinatorics

This class contains methods for performing basic combinatoric operations such as calculating numbers of permutations and combinations.

Combinatorics() - Constructor for class net.sourceforge.domian.test.combinatorics.Combinatorics

ConcurrentQueenPuzzle - Class in net.sourceforge.domian.test.benchmark

An amusing little computing task involving (possible) vast numbers of repository inserts, updates, and search.

ConcurrentQueenPuzzle(AbstractQueenPuzzle.RepositoryType, long, int, long) - Constructor for class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle

ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer - Class in net.sourceforge.domian.test.benchmark

ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer(long, long) - Constructor for class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer

conditionalLogging(Long, Long, StopWatch, QueenPuzzleConstellation, String) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleUtils

conditionalLogging(Long, Long, Long, StopWatch, QueenPuzzleConstellation, String) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleUtils

constellationConstraintOk(int[], int, int) - Method in class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer

Permutation constraints; no equal elements.

constellationConstraintOk(int[], int, int) - Method in class net.sourceforge.domian.test.benchmark.RandomCombinationQueenPuzzleConstellationFactory

constellationConstraintOk(int[], int, int) - Method in class net.sourceforge.domian.test.benchmark.RandomPermutationQueenPuzzleConstellationFactory

constellationConstraintOk(int[], int, int) - Method in class net.sourceforge.domian.test.benchmark.RandomSequenceQueenPuzzleConstellationFactory

constellationNumber - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

constellationNumberGenerator - Static variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

createRepository(AbstractQueenPuzzle.RepositoryType) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

D

diagonalLineConnections(int, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

doCompletionControl(Repository<QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

doConcurrentTask() - Method in class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer

doPersist(PersistentRepository<QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

doPrintProcessStatistics(long, long) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

doPrune - Variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

doPrune - Variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

doRepartition(PartitionRepository<QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

doResultSearch(Repository<QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

E

executionStyle - Static variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

F

factorial(int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Calculates the factorial (math: !)

fiveQueenPlacingsOK(int[], int[], int[], int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

fourQueenPlacingsOK(int[], int[], int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

G

generateAndPopulate(Repository) - Method in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

generateAndPopulate(Repository) - Method in class net.sourceforge.domian.test.benchmark.RandomSequenceQueenPuzzleConstellationFactory

generateAndPopulate(Repository) - Method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

generateQueenPuzzleConstellationsAndPutInto(Repository) - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

getExecutionStyle() - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

getNumberOfConstellationsPerExecution(Repository<AbstractQueenPuzzle>) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

getNumberOfExecutions(Repository<AbstractQueenPuzzle>) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

getNumberOfWorkerThreadsPerExecution(Repository<AbstractQueenPuzzle>) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

getQueen1Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen2Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen3Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen4Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen5Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen6Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen7Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getQueen8Placing() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

getRepositoryType(Repository<AbstractQueenPuzzle>) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

getSuccessfulQueenPuzzleConstellations() - Method in class net.sourceforge.domian.test.benchmark.SequentialQueenPuzzle

getType() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

getX() - Method in class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

getY() - Method in class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

H

hasNext() - Method in class net.sourceforge.domian.test.combinatorics.Combination

hasNext() - Method in class net.sourceforge.domian.test.combinatorics.Permutation

hasNext() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

HORIZONTAL - Static variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

HORIZONTAL - Static variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

I

isDisjointWith(Specification) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

isGeneralizationOf(Specification<? extends QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

isProcessed() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

isSatisfiedBy(QueenPuzzleConstellation) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

isSpecialCaseOf(Specification<? super QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

L

LEFT - Static variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

log - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

logInterval - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

logInterval - Variable in class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer

logInterval - Variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

logInterval - Variable in class net.sourceforge.domian.test.benchmark.RandomSequenceQueenPuzzleConstellationFactory

logInterval - Variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

M

m - Variable in class net.sourceforge.domian.test.combinatorics.Sequence

main(String[]) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

maximumNumberOfConstellationToProduce - Variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

maximumNumberOfConstellationToProduce - Variable in class net.sourceforge.domian.test.benchmark.RandomSequenceQueenPuzzleConstellationFactory

maximumNumberOfConstellationToProduce - Variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

N

n - Variable in class net.sourceforge.domian.test.combinatorics.Sequence

net.sourceforge.domian.test.benchmark - package net.sourceforge.domian.test.benchmark

net.sourceforge.domian.test.combinatorics - package net.sourceforge.domian.test.combinatorics

next() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

numberOfConstellations - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

numberOfConstellationsToProduce - Variable in class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle.RandomPermutationQueenPuzzleConstellationProducer

numberOfWorkers - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

O

or(Specification<? super QueenPuzzleConstellation>) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

P

P(int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Calculates the number of possible orderings of n elements where each element can only appear once (permutations), chosen from list of m elements (m set equal to n).

P(int, int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Calculates the number of possible orderings of n elements where each element can only appear once (permutations), chosen from list of m elements.

P - Variable in class net.sourceforge.domian.test.combinatorics.Permutation

Permutation - Class in net.sourceforge.domian.test.combinatorics

This class generates a list with number permutations according to a given length, n, and number of elements, m.

Permutation(int) - Constructor for class net.sourceforge.domian.test.combinatorics.Permutation

Permutation(int, int) - Constructor for class net.sourceforge.domian.test.combinatorics.Permutation

PermutationQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

PermutationQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

printReport(Repository<AbstractQueenPuzzle>) - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

processedQueenPuzzleConstellations - Static variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

PrunedSequenceQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

PrunedSequenceQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.PrunedSequenceQueenPuzzleConstellationFactory

Q

queen1Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen2Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen3Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen4Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen5Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen6Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen7Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queen8Placing - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

QueenPuzzleConstellation - Class in net.sourceforge.domian.test.benchmark

A simple entity class for holding a complete queen puzzle constellation consisting of eight queen pieces.

QueenPuzzleConstellation(ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing) - Constructor for class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

queenPuzzleConstellationsThatInherentlySolvesTheQueenPuzzle - Static variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

queenPuzzleConstellationsThatIsProcessedAndMarkedAsToSolveTheQueenPuzzle - Static variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

QueenPuzzlePersistenceVerifier - Class in net.sourceforge.domian.test.benchmark

QueenPuzzlePersistenceVerifier() - Constructor for class net.sourceforge.domian.test.benchmark.QueenPuzzlePersistenceVerifier

QueenPuzzleSpecification - Class in net.sourceforge.domian.test.benchmark

Specification of a QueenPuzzleConstellation solving the queen puzzle.

QueenPuzzleSpecification() - Constructor for class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

QueenPuzzleTestRunner - Class in net.sourceforge.domian.test.benchmark

An amusing little computing task involving (possible) vast numbers of repository inserts, updates, and search.

QueenPuzzleTestRunner() - Constructor for class net.sourceforge.domian.test.benchmark.QueenPuzzleTestRunner

QueenPuzzleUtils - Class in net.sourceforge.domian.test.benchmark

QueenPuzzleUtils() - Constructor for class net.sourceforge.domian.test.benchmark.QueenPuzzleUtils

R

RandomCombinationQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

RandomCombinationQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.RandomCombinationQueenPuzzleConstellationFactory

RandomPermutationQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

RandomPermutationQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.RandomPermutationQueenPuzzleConstellationFactory

RandomSequenceQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

RandomSequenceQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.RandomSequenceQueenPuzzleConstellationFactory

remove() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

repositoryType - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

reset() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

resetConstellationNumber() - Static method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

revolveSequence() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

RIGHT - Static variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

S

S(int, int) - Static method in class net.sourceforge.domian.test.combinatorics.Combinatorics

Calculates the number of possible orderings of n elements, chosen from list of m elements.

S - Variable in class net.sourceforge.domian.test.combinatorics.Sequence

Sequence - Class in net.sourceforge.domian.test.combinatorics

This class generates a list with number sequences according to a given length, n, and number of elements, m.

Sequence(int) - Constructor for class net.sourceforge.domian.test.combinatorics.Sequence

The number of elements to use is set equal to the length of the number sequences.

Sequence(int, int) - Constructor for class net.sourceforge.domian.test.combinatorics.Sequence

sequence - Variable in class net.sourceforge.domian.test.combinatorics.Sequence

sequenceConstraintOk() - Method in class net.sourceforge.domian.test.combinatorics.Combination

Permutation constraint: No numbers in the number sequence can be similar, and numbers must be ascending/ordered.

sequenceConstraintOk() - Method in class net.sourceforge.domian.test.combinatorics.Permutation

Permutation constraint: No numbers in the number sequence can be similar.

sequenceConstraintOk() - Method in class net.sourceforge.domian.test.combinatorics.Sequence

Number sequence constraint: None.

sequenceNumber - Variable in class net.sourceforge.domian.test.combinatorics.Sequence

SequenceQueenPuzzleConstellationFactory - Class in net.sourceforge.domian.test.benchmark

SequenceQueenPuzzleConstellationFactory(Long, Long) - Constructor for class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

SequentialQueenPuzzle - Class in net.sourceforge.domian.test.benchmark

An amusing little computing task involving (possible) vast numbers of repository inserts, updates, and search.

SequentialQueenPuzzle(AbstractQueenPuzzle.RepositoryType, Long, long) - Constructor for class net.sourceforge.domian.test.benchmark.SequentialQueenPuzzle

setSolvesQueenPuzzle(Boolean) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

sevenQueenPlacingsOK(int[], int[], int[], int[], int[], int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

sixQueenPlacingsOK(int[], int[], int[], int[], int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

solvePuzzle() - Method in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

solvePuzzle() - Method in class net.sourceforge.domian.test.benchmark.ConcurrentQueenPuzzle

solvePuzzle() - Method in class net.sourceforge.domian.test.benchmark.SequentialQueenPuzzle

solvesQueenPuzzle - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

solvesQueenPuzzle() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

straightXLineConnections(ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

straightYLineConnections(ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing, ChessPiecePlacing) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

successfulQueenPuzzleConstellations - Variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

T

threeQueenPlacingsOK(int[], int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

timeOfCreation - Variable in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

toString() - Method in class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

toString() - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleConstellation

twoQueenPlacingsOK(int[], int[]) - Static method in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

U

unProcessedQueenPuzzleConstellations - Static variable in class net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle

V

valueOf(String) - Static method in enum net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle.RepositoryType

Returns the enum constant of this type with the specified name.

values() - Static method in enum net.sourceforge.domian.test.benchmark.AbstractQueenPuzzle.RepositoryType

Returns an array containing the constants of this enum type, in the order they are declared.

VERTICAL - Static variable in class net.sourceforge.domian.test.benchmark.PermutationQueenPuzzleConstellationFactory

VERTICAL - Static variable in class net.sourceforge.domian.test.benchmark.SequenceQueenPuzzleConstellationFactory

W

where(String, Specification<F>) - Method in class net.sourceforge.domian.test.benchmark.QueenPuzzleSpecification

X

x - Variable in class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

Y

y - Variable in class net.sourceforge.domian.test.benchmark.ChessPiecePlacing

A C D E F G H I L M N O P Q R S T U V W X Y