mirror of
https://github.com/TheAlgorithms/Java.git
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Add convertion of numbers into their word representation (#6137)
This commit is contained in:
Prathamesh Zingade
committed by
GitHub
GitHub
parent
754bf6c5f8
commit
466ff0b4c2
48
DIRECTORY.md
48
DIRECTORY.md
@ -5,6 +5,7 @@
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* com
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* thealgorithms
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* audiofilters
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* [EMAFilter](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/audiofilters/EMAFilter.java)
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* [IIRFilter](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/audiofilters/IIRFilter.java)
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* backtracking
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* [AllPathsFromSourceToTarget](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/backtracking/AllPathsFromSourceToTarget.java)
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@ -107,6 +108,7 @@
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* [IPConverter](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/IPConverter.java)
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* [IPv6Converter](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/IPv6Converter.java)
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* [MorseCodeConverter](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/MorseCodeConverter.java)
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* [NumberToWords](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/NumberToWords.java)
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* [OctalToBinary](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/OctalToBinary.java)
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* [OctalToDecimal](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/OctalToDecimal.java)
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* [OctalToHexadecimal](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/OctalToHexadecimal.java)
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@ -147,6 +149,7 @@
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* [ConnectedComponent](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/ConnectedComponent.java)
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* [Cycles](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/Cycles.java)
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* [DijkstraAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/DijkstraAlgorithm.java)
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* [DijkstraOptimizedAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/DijkstraOptimizedAlgorithm.java)
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* [EdmondsBlossomAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/EdmondsBlossomAlgorithm.java)
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* [FloydWarshall](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/FloydWarshall.java)
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* [FordFulkerson](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/graphs/FordFulkerson.java)
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@ -404,6 +407,7 @@
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* [GCD](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/GCD.java)
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* [GCDRecursion](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/GCDRecursion.java)
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* [GenericRoot](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/GenericRoot.java)
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* [GoldbachConjecture](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/GoldbachConjecture.java)
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* [HarshadNumber](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/HarshadNumber.java)
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* [HeronsFormula](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/HeronsFormula.java)
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* [JosephusProblem](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/JosephusProblem.java)
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@ -470,21 +474,24 @@
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* [VampireNumber](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/VampireNumber.java)
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* [VectorCrossProduct](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/VectorCrossProduct.java)
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* [Volume](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/maths/Volume.java)
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* matrixexponentiation
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* [Fibonacci](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrixexponentiation/Fibonacci.java)
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* matrix
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* [InverseOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/InverseOfMatrix.java)
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* matrixexponentiation
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* [Fibonacci](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/matrixexponentiation/Fibonacci.java)
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* [MatrixTranspose](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/MatrixTranspose.java)
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* [MedianOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/MedianOfMatrix.java)
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* [MirrorOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/MirrorOfMatrix.java)
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* [PrintAMatrixInSpiralOrder](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/PrintAMatrixInSpiralOrder.java)
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* [RotateMatrixBy90Degrees](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/matrix/RotateMatrixBy90Degrees.java)
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* misc
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* [ColorContrastRatio](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/ColorContrastRatio.java)
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* [InverseOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/InverseOfMatrix.java)
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* [MapReduce](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MapReduce.java)
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* [MatrixTranspose](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MatrixTranspose.java)
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* [MedianOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfMatrix.java)
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* [MedianOfRunningArray](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArray.java)
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* [MedianOfRunningArrayByte](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArrayByte.java)
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* [MedianOfRunningArrayDouble](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArrayDouble.java)
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* [MedianOfRunningArrayFloat](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArrayFloat.java)
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* [MedianOfRunningArrayInteger](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArrayInteger.java)
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* [MedianOfRunningArrayLong](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MedianOfRunningArrayLong.java)
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* [MirrorOfMatrix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/MirrorOfMatrix.java)
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* [PalindromePrime](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/PalindromePrime.java)
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* [PalindromeSinglyLinkedList](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/PalindromeSinglyLinkedList.java)
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* [RangeInSortedArray](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/misc/RangeInSortedArray.java)
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@ -508,7 +515,6 @@
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* [CRCAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/CRCAlgorithm.java)
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* [Damm](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Damm.java)
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* [Dijkstra](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Dijkstra.java)
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* [FibbonaciSeries](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/FibbonaciSeries.java)
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* [FloydTriangle](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/FloydTriangle.java)
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* [GaussLegendre](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/GaussLegendre.java)
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* [HappyNumbersSeq](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/HappyNumbersSeq.java)
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@ -529,18 +535,17 @@
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* [PageRank](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/PageRank.java)
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* [PasswordGen](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/PasswordGen.java)
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* [PerlinNoise](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/PerlinNoise.java)
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* [PrintAMatrixInSpiralOrder](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/PrintAMatrixInSpiralOrder.java)
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* [QueueUsingTwoStacks](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/QueueUsingTwoStacks.java)
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* [RemoveDuplicateFromString](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/RemoveDuplicateFromString.java)
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* [ReverseStackUsingRecursion](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/ReverseStackUsingRecursion.java)
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* [RotateMatrixBy90Degrees](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/RotateMatrixBy90Degrees.java)
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* [SkylineProblem](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/SkylineProblem.java)
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* [Sudoku](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Sudoku.java)
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* [TowerOfHanoi](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/TowerOfHanoi.java)
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* [TwoPointers](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/TwoPointers.java)
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* [Verhoeff](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/others/Verhoeff.java)
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* Recursion
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* [GenerateSubsets](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/Recursion/GenerateSubsets.java)
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* recursion
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* [FibonacciSeries](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/recursion/FibonacciSeries.java)
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* [GenerateSubsets](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/recursion/GenerateSubsets.java)
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* scheduling
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* [AgingScheduling](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/scheduling/AgingScheduling.java)
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* diskscheduling
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@ -718,6 +723,7 @@
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* com
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* thealgorithms
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* audiofilters
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* [EMAFilterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/audiofilters/EMAFilterTest.java)
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* [IIRFilterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/audiofilters/IIRFilterTest.java)
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* backtracking
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* [AllPathsFromSourceToTargetTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/backtracking/AllPathsFromSourceToTargetTest.java)
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@ -814,6 +820,7 @@
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* [IPConverterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/IPConverterTest.java)
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* [IPv6ConverterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/IPv6ConverterTest.java)
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* [MorseCodeConverterTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/MorseCodeConverterTest.java)
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* [NumberToWordsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/NumberToWordsTest.java)
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* [OctalToBinaryTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/OctalToBinaryTest.java)
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* [OctalToDecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/OctalToDecimalTest.java)
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* [OctalToHexadecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/OctalToHexadecimalTest.java)
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@ -849,6 +856,7 @@
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* [BipartiteGraphDFSTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/BipartiteGraphDFSTest.java)
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* [BoruvkaAlgorithmTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/BoruvkaAlgorithmTest.java)
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* [DijkstraAlgorithmTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/DijkstraAlgorithmTest.java)
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* [DijkstraOptimizedAlgorithmTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/DijkstraOptimizedAlgorithmTest.java)
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* [EdmondsBlossomAlgorithmTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/EdmondsBlossomAlgorithmTest.java)
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* [FloydWarshallTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/FloydWarshallTest.java)
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* [FordFulkersonTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/datastructures/graphs/FordFulkersonTest.java)
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@ -1070,6 +1078,7 @@
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* [GCDRecursionTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/GCDRecursionTest.java)
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* [GCDTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/GCDTest.java)
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* [GenericRootTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/GenericRootTest.java)
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* [GoldbachConjectureTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/GoldbachConjectureTest.java)
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* [HarshadNumberTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/HarshadNumberTest.java)
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* [HeronsFormulaTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/HeronsFormulaTest.java)
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* [JosephusProblemTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/JosephusProblemTest.java)
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@ -1126,15 +1135,18 @@
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* [TestArmstrong](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/TestArmstrong.java)
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* [TwinPrimeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/TwinPrimeTest.java)
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* [UniformNumbersTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/UniformNumbersTest.java)
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* [VampireNumberTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/VampireNumberTest.java)
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* [VolumeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/maths/VolumeTest.java)
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* matrix
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* [InverseOfMatrixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/matrix/InverseOfMatrixTest.java)
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* [MatrixTransposeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/matrix/MatrixTransposeTest.java)
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* [MedianOfMatrixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/matrix/MedianOfMatrixTest.java)
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* [MirrorOfMatrixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/matrix/MirrorOfMatrixTest.java)
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* [TestPrintMatrixInSpiralOrder](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/matrix/TestPrintMatrixInSpiralOrder.java)
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* misc
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* [ColorContrastRatioTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/ColorContrastRatioTest.java)
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* [InverseOfMatrixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/InverseOfMatrixTest.java)
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* [MapReduceTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/MapReduceTest.java)
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* [MatrixTransposeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/MatrixTransposeTest.java)
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* [MedianOfMatrixtest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/MedianOfMatrixtest.java)
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* [MedianOfRunningArrayTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/MedianOfRunningArrayTest.java)
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* [MirrorOfMatrixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/MirrorOfMatrixTest.java)
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* [PalindromePrimeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/PalindromePrimeTest.java)
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* [PalindromeSinglyLinkedListTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java)
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* [RangeInSortedArrayTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/RangeInSortedArrayTest.java)
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@ -1171,12 +1183,12 @@
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* [ReverseStackUsingRecursionTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/ReverseStackUsingRecursionTest.java)
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* [SkylineProblemTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/SkylineProblemTest.java)
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* [SudokuTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/SudokuTest.java)
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* [TestPrintMatrixInSpiralOrder](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/TestPrintMatrixInSpiralOrder.java)
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* [TowerOfHanoiTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/TowerOfHanoiTest.java)
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* [TwoPointersTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/TwoPointersTest.java)
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* [WorstFitCPUTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/WorstFitCPUTest.java)
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* Recursion
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* [GenerateSubsetsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/Recursion/GenerateSubsetsTest.java)
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* recursion
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* [FibonacciSeriesTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/recursion/FibonacciSeriesTest.java)
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* [GenerateSubsetsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/recursion/GenerateSubsetsTest.java)
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* scheduling
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* [AgingSchedulingTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/scheduling/AgingSchedulingTest.java)
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* diskscheduling
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100
src/main/java/com/thealgorithms/conversions/NumberToWords.java
Normal file
100
src/main/java/com/thealgorithms/conversions/NumberToWords.java
Normal file
@ -0,0 +1,100 @@
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package com.thealgorithms.conversions;
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import java.math.BigDecimal;
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/**
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A Java-based utility for converting numeric values into their English word
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representations. Whether you need to convert a small number, a large number
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with millions and billions, or even a number with decimal places, this utility
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has you covered.
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*
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*/
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public final class NumberToWords {
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private NumberToWords() {
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}
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private static final String[] UNITS = {"", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"};
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private static final String[] TENS = {"", "", "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};
|
||||
|
||||
private static final String[] POWERS = {"", "Thousand", "Million", "Billion", "Trillion"};
|
||||
|
||||
private static final String ZERO = "Zero";
|
||||
private static final String POINT = " Point";
|
||||
private static final String NEGATIVE = "Negative ";
|
||||
|
||||
public static String convert(BigDecimal number) {
|
||||
if (number == null) {
|
||||
return "Invalid Input";
|
||||
}
|
||||
|
||||
// Check for negative sign
|
||||
boolean isNegative = number.signum() < 0;
|
||||
|
||||
// Split the number into whole and fractional parts
|
||||
BigDecimal[] parts = number.abs().divideAndRemainder(BigDecimal.ONE);
|
||||
BigDecimal wholePart = parts[0]; // Keep whole part as BigDecimal
|
||||
String fractionalPartStr = parts[1].compareTo(BigDecimal.ZERO) > 0 ? parts[1].toPlainString().substring(2) : ""; // Get fractional part only if it exists
|
||||
|
||||
// Convert whole part to words
|
||||
StringBuilder result = new StringBuilder();
|
||||
if (isNegative) {
|
||||
result.append(NEGATIVE);
|
||||
}
|
||||
result.append(convertWholeNumberToWords(wholePart));
|
||||
|
||||
// Convert fractional part to words
|
||||
if (!fractionalPartStr.isEmpty()) {
|
||||
result.append(POINT);
|
||||
for (char digit : fractionalPartStr.toCharArray()) {
|
||||
int digitValue = Character.getNumericValue(digit);
|
||||
result.append(" ").append(digitValue == 0 ? ZERO : UNITS[digitValue]);
|
||||
}
|
||||
}
|
||||
|
||||
return result.toString().trim();
|
||||
}
|
||||
|
||||
private static String convertWholeNumberToWords(BigDecimal number) {
|
||||
if (number.compareTo(BigDecimal.ZERO) == 0) {
|
||||
return ZERO;
|
||||
}
|
||||
|
||||
StringBuilder words = new StringBuilder();
|
||||
int power = 0;
|
||||
|
||||
while (number.compareTo(BigDecimal.ZERO) > 0) {
|
||||
// Get the last three digits
|
||||
BigDecimal[] divisionResult = number.divideAndRemainder(BigDecimal.valueOf(1000));
|
||||
int chunk = divisionResult[1].intValue();
|
||||
|
||||
if (chunk > 0) {
|
||||
String chunkWords = convertChunk(chunk);
|
||||
if (power > 0) {
|
||||
words.insert(0, POWERS[power] + " ");
|
||||
}
|
||||
words.insert(0, chunkWords + " ");
|
||||
}
|
||||
|
||||
number = divisionResult[0]; // Continue with the remaining part
|
||||
power++;
|
||||
}
|
||||
|
||||
return words.toString().trim();
|
||||
}
|
||||
|
||||
private static String convertChunk(int number) {
|
||||
String chunkWords;
|
||||
|
||||
if (number < 20) {
|
||||
chunkWords = UNITS[number];
|
||||
} else if (number < 100) {
|
||||
chunkWords = TENS[number / 10] + (number % 10 > 0 ? " " + UNITS[number % 10] : "");
|
||||
} else {
|
||||
chunkWords = UNITS[number / 100] + " Hundred" + (number % 100 > 0 ? " " + convertChunk(number % 100) : "");
|
||||
}
|
||||
|
||||
return chunkWords;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,60 @@
|
||||
package com.thealgorithms.conversions;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
|
||||
import java.math.BigDecimal;
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
public class NumberToWordsTest {
|
||||
|
||||
@Test
|
||||
void testNullInput() {
|
||||
assertEquals("Invalid Input", NumberToWords.convert(null), "Null input should return 'Invalid Input'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testZeroInput() {
|
||||
assertEquals("Zero", NumberToWords.convert(BigDecimal.ZERO), "Zero input should return 'Zero'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testPositiveWholeNumbers() {
|
||||
assertEquals("One", NumberToWords.convert(BigDecimal.ONE), "1 should convert to 'One'");
|
||||
assertEquals("One Thousand", NumberToWords.convert(new BigDecimal("1000")), "1000 should convert to 'One Thousand'");
|
||||
assertEquals("One Million", NumberToWords.convert(new BigDecimal("1000000")), "1000000 should convert to 'One Million'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testNegativeWholeNumbers() {
|
||||
assertEquals("Negative One", NumberToWords.convert(new BigDecimal("-1")), "-1 should convert to 'Negative One'");
|
||||
assertEquals("Negative One Thousand", NumberToWords.convert(new BigDecimal("-1000")), "-1000 should convert to 'Negative One Thousand'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testFractionalNumbers() {
|
||||
assertEquals("Zero Point One Two Three", NumberToWords.convert(new BigDecimal("0.123")), "0.123 should convert to 'Zero Point One Two Three'");
|
||||
assertEquals("Negative Zero Point Four Five Six", NumberToWords.convert(new BigDecimal("-0.456")), "-0.456 should convert to 'Negative Zero Point Four Five Six'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testLargeNumbers() {
|
||||
assertEquals("Nine Hundred Ninety Nine Million Nine Hundred Ninety Nine Thousand Nine Hundred Ninety Nine", NumberToWords.convert(new BigDecimal("999999999")), "999999999 should convert correctly");
|
||||
assertEquals("One Trillion", NumberToWords.convert(new BigDecimal("1000000000000")), "1000000000000 should convert to 'One Trillion'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testNegativeLargeNumbers() {
|
||||
assertEquals("Negative Nine Trillion Eight Hundred Seventy Six Billion Five Hundred Forty Three Million Two Hundred Ten Thousand Nine Hundred Eighty Seven", NumberToWords.convert(new BigDecimal("-9876543210987")), "-9876543210987 should convert correctly");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testFloatingPointPrecision() {
|
||||
assertEquals("One Million Point Zero Zero One", NumberToWords.convert(new BigDecimal("1000000.001")), "1000000.001 should convert to 'One Million Point Zero Zero One'");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testEdgeCases() {
|
||||
assertEquals("Zero", NumberToWords.convert(new BigDecimal("-0.0")), "-0.0 should convert to 'Zero'");
|
||||
assertEquals("Zero Point Zero Zero Zero Zero Zero Zero One", NumberToWords.convert(new BigDecimal("1E-7")), "1E-7 should convert to 'Zero Point Zero Zero Zero Zero Zero Zero One'");
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user