mirror of
https://github.com/TheAlgorithms/Java.git
synced 2025-07-07 01:35:16 +08:00
Enhance docs, add more tests in IntegerToEnglish (#5924)
This commit is contained in:
Hardik Pawar
20
DIRECTORY.md
20
DIRECTORY.md
@ -64,12 +64,15 @@
|
||||
* [AffineCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/AffineCipher.java)
|
||||
* [AtbashCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/AtbashCipher.java)
|
||||
* [Autokey](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/Autokey.java)
|
||||
* [BaconianCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/BaconianCipher.java)
|
||||
* [Blowfish](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/Blowfish.java)
|
||||
* [Caesar](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/Caesar.java)
|
||||
* [ColumnarTranspositionCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/ColumnarTranspositionCipher.java)
|
||||
* [DES](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/DES.java)
|
||||
* [DiffieHellman](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/DiffieHellman.java)
|
||||
* [ECC](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/ECC.java)
|
||||
* [HillCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/HillCipher.java)
|
||||
* [MonoAlphabetic](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/MonoAlphabetic.java)
|
||||
* [PlayfairCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/PlayfairCipher.java)
|
||||
* [Polybius](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/Polybius.java)
|
||||
* [ProductCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/ProductCipher.java)
|
||||
@ -311,6 +314,8 @@
|
||||
* [ConvexHull](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/geometry/ConvexHull.java)
|
||||
* [GrahamScan](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/geometry/GrahamScan.java)
|
||||
* [Point](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/geometry/Point.java)
|
||||
* graph
|
||||
* [StronglyConnectedComponentOptimized](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/graph/StronglyConnectedComponentOptimized.java)
|
||||
* greedyalgorithms
|
||||
* [ActivitySelection](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/greedyalgorithms/ActivitySelection.java)
|
||||
* [BinaryAddition](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/greedyalgorithms/BinaryAddition.java)
|
||||
@ -564,6 +569,7 @@
|
||||
* [UnionFind](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/searches/UnionFind.java)
|
||||
* [UpperBound](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/searches/UpperBound.java)
|
||||
* sorts
|
||||
* [AdaptiveMergeSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/AdaptiveMergeSort.java)
|
||||
* [BeadSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/BeadSort.java)
|
||||
* [BinaryInsertionSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/BinaryInsertionSort.java)
|
||||
* [BitonicSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/BitonicSort.java)
|
||||
@ -603,6 +609,7 @@
|
||||
* [SortUtils](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/SortUtils.java)
|
||||
* [SortUtilsRandomGenerator](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/SortUtilsRandomGenerator.java)
|
||||
* [SpreadSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/SpreadSort.java)
|
||||
* [StalinSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/StalinSort.java)
|
||||
* [StoogeSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/StoogeSort.java)
|
||||
* [StrandSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/StrandSort.java)
|
||||
* [SwapSort](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/SwapSort.java)
|
||||
@ -616,6 +623,7 @@
|
||||
* [CelebrityFinder](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/CelebrityFinder.java)
|
||||
* [DecimalToAnyUsingStack](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/DecimalToAnyUsingStack.java)
|
||||
* [DuplicateBrackets](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/DuplicateBrackets.java)
|
||||
* [GreatestElementConstantTime](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/GreatestElementConstantTime.java)
|
||||
* [InfixToPostfix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/InfixToPostfix.java)
|
||||
* [InfixToPrefix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/InfixToPrefix.java)
|
||||
* [LargestRectangle](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/LargestRectangle.java)
|
||||
@ -624,10 +632,12 @@
|
||||
* [MinStackUsingTwoStacks](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/MinStackUsingTwoStacks.java)
|
||||
* [NextGreaterElement](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/NextGreaterElement.java)
|
||||
* [NextSmallerElement](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/NextSmallerElement.java)
|
||||
* [PalindromeWithStack](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/PalindromeWithStack.java)
|
||||
* [PostfixEvaluator](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/PostfixEvaluator.java)
|
||||
* [PostfixToInfix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/PostfixToInfix.java)
|
||||
* [PrefixEvaluator](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/PrefixEvaluator.java)
|
||||
* [PrefixToInfix](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/PrefixToInfix.java)
|
||||
* [SmallestElementConstantTime](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/SmallestElementConstantTime.java)
|
||||
* [SortStack](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/SortStack.java)
|
||||
* [StackPostfixNotation](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/StackPostfixNotation.java)
|
||||
* [StackUsingTwoQueues](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/stacks/StackUsingTwoQueues.java)
|
||||
@ -726,12 +736,15 @@
|
||||
* [AffineCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/AffineCipherTest.java)
|
||||
* [AtbashTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/AtbashTest.java)
|
||||
* [AutokeyTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/AutokeyTest.java)
|
||||
* [BaconianCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/BaconianCipherTest.java)
|
||||
* [BlowfishTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/BlowfishTest.java)
|
||||
* [CaesarTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/CaesarTest.java)
|
||||
* [ColumnarTranspositionCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/ColumnarTranspositionCipherTest.java)
|
||||
* [DESTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/DESTest.java)
|
||||
* [DiffieHellmanTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/DiffieHellmanTest.java)
|
||||
* [ECCTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/ECCTest.java)
|
||||
* [HillCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/HillCipherTest.java)
|
||||
* [MonoAlphabeticTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/MonoAlphabeticTest.java)
|
||||
* [PlayfairTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/PlayfairTest.java)
|
||||
* [PolybiusTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/PolybiusTest.java)
|
||||
* [RailFenceTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/RailFenceTest.java)
|
||||
@ -914,6 +927,8 @@
|
||||
* [BresenhamLineTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/geometry/BresenhamLineTest.java)
|
||||
* [ConvexHullTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/geometry/ConvexHullTest.java)
|
||||
* [GrahamScanTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/geometry/GrahamScanTest.java)
|
||||
* graph
|
||||
* [StronglyConnectedComponentOptimizedTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/graph/StronglyConnectedComponentOptimizedTest.java)
|
||||
* greedyalgorithms
|
||||
* [ActivitySelectionTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/greedyalgorithms/ActivitySelectionTest.java)
|
||||
* [BinaryAdditionTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/greedyalgorithms/BinaryAdditionTest.java)
|
||||
@ -1133,6 +1148,7 @@
|
||||
* [UnionFindTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/searches/UnionFindTest.java)
|
||||
* [UpperBoundTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/searches/UpperBoundTest.java)
|
||||
* sorts
|
||||
* [AdaptiveMergeSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/AdaptiveMergeSortTest.java)
|
||||
* [BeadSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/BeadSortTest.java)
|
||||
* [BinaryInsertionSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/BinaryInsertionSortTest.java)
|
||||
* [BitonicSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/BitonicSortTest.java)
|
||||
@ -1171,6 +1187,7 @@
|
||||
* [SortUtilsRandomGeneratorTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SortUtilsRandomGeneratorTest.java)
|
||||
* [SortUtilsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SortUtilsTest.java)
|
||||
* [SpreadSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SpreadSortTest.java)
|
||||
* [StalinSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/StalinSortTest.java)
|
||||
* [StoogeSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/StoogeSortTest.java)
|
||||
* [StrandSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/StrandSortTest.java)
|
||||
* [SwapSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SwapSortTest.java)
|
||||
@ -1184,6 +1201,7 @@
|
||||
* [CelebrityFinderTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/CelebrityFinderTest.java)
|
||||
* [DecimalToAnyUsingStackTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/DecimalToAnyUsingStackTest.java)
|
||||
* [DuplicateBracketsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/DuplicateBracketsTest.java)
|
||||
* [GreatestElementConstantTimeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/GreatestElementConstantTimeTest.java)
|
||||
* [InfixToPostfixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/InfixToPostfixTest.java)
|
||||
* [InfixToPrefixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/InfixToPrefixTest.java)
|
||||
* [LargestRectangleTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/LargestRectangleTest.java)
|
||||
@ -1191,10 +1209,12 @@
|
||||
* [MinStackUsingTwoStacksTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/MinStackUsingTwoStacksTest.java)
|
||||
* [NextGreaterElementTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/NextGreaterElementTest.java)
|
||||
* [NextSmallerElementTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/NextSmallerElementTest.java)
|
||||
* [PalindromeWithStackTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/PalindromeWithStackTest.java)
|
||||
* [PostfixEvaluatorTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/PostfixEvaluatorTest.java)
|
||||
* [PostfixToInfixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/PostfixToInfixTest.java)
|
||||
* [PrefixEvaluatorTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/PrefixEvaluatorTest.java)
|
||||
* [PrefixToInfixTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/PrefixToInfixTest.java)
|
||||
* [SmallestElementConstantTimeTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/SmallestElementConstantTimeTest.java)
|
||||
* [SortStackTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/SortStackTest.java)
|
||||
* [StackPostfixNotationTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/StackPostfixNotationTest.java)
|
||||
* [StackUsingTwoQueuesTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/stacks/StackUsingTwoQueuesTest.java)
|
||||
|
||||
@ -2,7 +2,28 @@ package com.thealgorithms.conversions;
|
||||
|
||||
import java.util.Map;
|
||||
|
||||
/**
|
||||
* A utility class to convert integers to their English word representation.
|
||||
*
|
||||
* <p>The class supports conversion of numbers from 0 to 2,147,483,647
|
||||
* (the maximum value of a 32-bit signed integer). It divides the number
|
||||
* into groups of three digits (thousands, millions, billions, etc.) and
|
||||
* translates each group into words.</p>
|
||||
*
|
||||
* <h2>Example Usage</h2>
|
||||
* <pre>
|
||||
* IntegerToEnglish.integerToEnglishWords(12345);
|
||||
* // Output: "Twelve Thousand Three Hundred Forty Five"
|
||||
* </pre>
|
||||
*
|
||||
* <p>This class uses two maps:</p>
|
||||
* <ul>
|
||||
* <li>BASE_NUMBERS_MAP: Holds English words for numbers 0-20, multiples of 10 up to 90, and 100.</li>
|
||||
* <li>THOUSAND_POWER_MAP: Maps powers of 1000 (e.g., Thousand, Million, Billion).</li>
|
||||
* </ul>
|
||||
*/
|
||||
public final class IntegerToEnglish {
|
||||
|
||||
private static final Map<Integer, String> BASE_NUMBERS_MAP = Map.ofEntries(Map.entry(0, ""), Map.entry(1, "One"), Map.entry(2, "Two"), Map.entry(3, "Three"), Map.entry(4, "Four"), Map.entry(5, "Five"), Map.entry(6, "Six"), Map.entry(7, "Seven"), Map.entry(8, "Eight"), Map.entry(9, "Nine"),
|
||||
Map.entry(10, "Ten"), Map.entry(11, "Eleven"), Map.entry(12, "Twelve"), Map.entry(13, "Thirteen"), Map.entry(14, "Fourteen"), Map.entry(15, "Fifteen"), Map.entry(16, "Sixteen"), Map.entry(17, "Seventeen"), Map.entry(18, "Eighteen"), Map.entry(19, "Nineteen"), Map.entry(20, "Twenty"),
|
||||
Map.entry(30, "Thirty"), Map.entry(40, "Forty"), Map.entry(50, "Fifty"), Map.entry(60, "Sixty"), Map.entry(70, "Seventy"), Map.entry(80, "Eighty"), Map.entry(90, "Ninety"), Map.entry(100, "Hundred"));
|
||||
@ -13,35 +34,46 @@ public final class IntegerToEnglish {
|
||||
}
|
||||
|
||||
/**
|
||||
converts numbers < 1000 to english words
|
||||
* Converts numbers less than 1000 into English words.
|
||||
*
|
||||
* @param number the integer value (0-999) to convert
|
||||
* @return the English word representation of the input number
|
||||
*/
|
||||
private static String convertToWords(int number) {
|
||||
int remainder = number % 100;
|
||||
|
||||
String result;
|
||||
StringBuilder result = new StringBuilder();
|
||||
|
||||
if (remainder <= 20) {
|
||||
result = BASE_NUMBERS_MAP.get(remainder);
|
||||
result.append(BASE_NUMBERS_MAP.get(remainder));
|
||||
} else if (BASE_NUMBERS_MAP.containsKey(remainder)) {
|
||||
result = BASE_NUMBERS_MAP.get(remainder);
|
||||
result.append(BASE_NUMBERS_MAP.get(remainder));
|
||||
} else {
|
||||
int tensDigit = remainder / 10;
|
||||
int onesDigit = remainder % 10;
|
||||
|
||||
result = String.format("%s %s", BASE_NUMBERS_MAP.get(tensDigit * 10), BASE_NUMBERS_MAP.get(onesDigit));
|
||||
String tens = BASE_NUMBERS_MAP.getOrDefault(tensDigit * 10, "");
|
||||
String ones = BASE_NUMBERS_MAP.getOrDefault(onesDigit, "");
|
||||
result.append(tens);
|
||||
if (ones != null && !ones.isEmpty()) {
|
||||
result.append(" ").append(ones);
|
||||
}
|
||||
}
|
||||
|
||||
int hundredsDigit = number / 100;
|
||||
|
||||
if (hundredsDigit > 0) {
|
||||
result = String.format("%s %s%s", BASE_NUMBERS_MAP.get(hundredsDigit), BASE_NUMBERS_MAP.get(100), result.isEmpty() ? "" : " " + result);
|
||||
if (result.length() > 0) {
|
||||
result.insert(0, " ");
|
||||
}
|
||||
result.insert(0, String.format("%s Hundred", BASE_NUMBERS_MAP.get(hundredsDigit)));
|
||||
}
|
||||
|
||||
return result;
|
||||
return result.toString().trim();
|
||||
}
|
||||
|
||||
/**
|
||||
Only convert groups of three digit if they are non-zero
|
||||
* Converts a non-negative integer to its English word representation.
|
||||
*
|
||||
* @param number the integer to convert (0-2,147,483,647)
|
||||
* @return the English word representation of the input number
|
||||
*/
|
||||
public static String integerToEnglishWords(int number) {
|
||||
if (number == 0) {
|
||||
@ -49,7 +81,6 @@ public final class IntegerToEnglish {
|
||||
}
|
||||
|
||||
StringBuilder result = new StringBuilder();
|
||||
|
||||
int index = 0;
|
||||
|
||||
while (number > 0) {
|
||||
@ -58,23 +89,20 @@ public final class IntegerToEnglish {
|
||||
|
||||
if (remainder > 0) {
|
||||
String subResult = convertToWords(remainder);
|
||||
|
||||
if (!subResult.isEmpty()) {
|
||||
if (!result.isEmpty()) {
|
||||
result.insert(0, subResult + " " + THOUSAND_POWER_MAP.get(index) + " ");
|
||||
} else {
|
||||
if (index > 0) {
|
||||
result = new StringBuilder(subResult + " " + THOUSAND_POWER_MAP.get(index));
|
||||
} else {
|
||||
result = new StringBuilder(subResult);
|
||||
}
|
||||
if (index > 0) {
|
||||
subResult += " " + THOUSAND_POWER_MAP.get(index);
|
||||
}
|
||||
if (result.length() > 0) {
|
||||
result.insert(0, " ");
|
||||
}
|
||||
result.insert(0, subResult);
|
||||
}
|
||||
}
|
||||
|
||||
index++;
|
||||
}
|
||||
|
||||
return result.toString();
|
||||
return result.toString().trim();
|
||||
}
|
||||
}
|
||||
|
||||
@ -11,5 +11,36 @@ public class IntegerToEnglishTest {
|
||||
assertEquals("Two Billion One Hundred Forty Seven Million Four Hundred Eighty Three Thousand Six Hundred Forty Seven", IntegerToEnglish.integerToEnglishWords(2147483647));
|
||||
assertEquals("One Million Two Hundred Thirty Four Thousand Five Hundred Sixty Seven", IntegerToEnglish.integerToEnglishWords(1234567));
|
||||
assertEquals("Twelve Thousand Three Hundred Forty Five", IntegerToEnglish.integerToEnglishWords(12345));
|
||||
assertEquals("One Hundred", IntegerToEnglish.integerToEnglishWords(100));
|
||||
assertEquals("Zero", IntegerToEnglish.integerToEnglishWords(0));
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testSmallNumbers() {
|
||||
assertEquals("Ten", IntegerToEnglish.integerToEnglishWords(10));
|
||||
assertEquals("Nineteen", IntegerToEnglish.integerToEnglishWords(19));
|
||||
assertEquals("Twenty One", IntegerToEnglish.integerToEnglishWords(21));
|
||||
assertEquals("Ninety Nine", IntegerToEnglish.integerToEnglishWords(99));
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testHundreds() {
|
||||
assertEquals("One Hundred One", IntegerToEnglish.integerToEnglishWords(101));
|
||||
assertEquals("Five Hundred Fifty", IntegerToEnglish.integerToEnglishWords(550));
|
||||
assertEquals("Nine Hundred Ninety Nine", IntegerToEnglish.integerToEnglishWords(999));
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testThousands() {
|
||||
assertEquals("One Thousand", IntegerToEnglish.integerToEnglishWords(1000));
|
||||
assertEquals("Ten Thousand One", IntegerToEnglish.integerToEnglishWords(10001));
|
||||
assertEquals("Seventy Six Thousand Five Hundred Forty Three", IntegerToEnglish.integerToEnglishWords(76543));
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testEdgeCases() {
|
||||
assertEquals("One Million", IntegerToEnglish.integerToEnglishWords(1_000_000));
|
||||
assertEquals("One Billion", IntegerToEnglish.integerToEnglishWords(1_000_000_000));
|
||||
assertEquals("Two Thousand", IntegerToEnglish.integerToEnglishWords(2000));
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user