diff --git a/algorithms/pom.xml b/algorithms/pom.xml
index 2eb8cd42b6..8751cf45c0 100644
--- a/algorithms/pom.xml
+++ b/algorithms/pom.xml
@@ -9,6 +9,7 @@
1.5.0
1.16.12
3.6.1
+ 1.0.1
@@ -39,6 +40,11 @@
jgrapht-core
1.0.1
+
+ pl.allegro.finance
+ tradukisto
+ ${tradukisto.version}
+
org.assertj
assertj-core
@@ -46,7 +52,6 @@
test
-
@@ -77,4 +82,4 @@
-
+
\ No newline at end of file
diff --git a/algorithms/src/main/java/com/baeldung/algorithms/numberwordconverter/NumberWordConverter.java b/algorithms/src/main/java/com/baeldung/algorithms/numberwordconverter/NumberWordConverter.java
new file mode 100644
index 0000000000..0fe2960f96
--- /dev/null
+++ b/algorithms/src/main/java/com/baeldung/algorithms/numberwordconverter/NumberWordConverter.java
@@ -0,0 +1,75 @@
+package com.baeldung.algorithms.numberwordconverter;
+
+import java.math.BigDecimal;
+
+import pl.allegro.finance.tradukisto.MoneyConverters;
+
+public class NumberWordConverter {
+
+ public static final String INVALID_INPUT_GIVEN = "Invalid input given";
+
+ public static final String[] ones = { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
+
+ public static final String[] tens = {
+ "", // 0
+ "", // 1
+ "twenty", // 2
+ "thirty", // 3
+ "forty", // 4
+ "fifty", // 5
+ "sixty", // 6
+ "seventy", // 7
+ "eighty", // 8
+ "ninety" // 9
+ };
+
+ public static String getMoneyIntoWords(String input) {
+ MoneyConverters converter = MoneyConverters.ENGLISH_BANKING_MONEY_VALUE;
+ return converter.asWords(new BigDecimal(input));
+ }
+
+ public static String getMoneyIntoWords(final double money) {
+ long dollar = (long) money;
+ long cents = Math.round((money - dollar) * 100);
+ if (money == 0D) {
+ return "";
+ }
+ if (money < 0) {
+ return INVALID_INPUT_GIVEN;
+ }
+ String dollarPart = "";
+ if (dollar > 0) {
+ dollarPart = convert(dollar) + " dollar" + (dollar == 1 ? "" : "s");
+ }
+ String centsPart = "";
+ if (cents > 0) {
+ if (dollarPart.length() > 0) {
+ centsPart = " and ";
+ }
+ centsPart += convert(cents) + " cent" + (cents == 1 ? "" : "s");
+ }
+ return dollarPart + centsPart;
+ }
+
+ private static String convert(final long n) {
+ if (n < 0) {
+ return INVALID_INPUT_GIVEN;
+ }
+ if (n < 20) {
+ return ones[(int) n];
+ }
+ if (n < 100) {
+ return tens[(int) n / 10] + ((n % 10 != 0) ? " " : "") + ones[(int) n % 10];
+ }
+ if (n < 1000) {
+ return ones[(int) n / 100] + " hundred" + ((n % 100 != 0) ? " " : "") + convert(n % 100);
+ }
+ if (n < 1_000_000) {
+ return convert(n / 1000) + " thousand" + ((n % 1000 != 0) ? " " : "") + convert(n % 1000);
+ }
+ if (n < 1_000_000_000) {
+ return convert(n / 1_000_000) + " million" + ((n % 1_000_000 != 0) ? " " : "") + convert(n % 1_000_000);
+ }
+ return convert(n / 1_000_000_000) + " billion" + ((n % 1_000_000_000 != 0) ? " " : "") + convert(n % 1_000_000_000);
+ }
+}
\ No newline at end of file
diff --git a/algorithms/src/test/java/com/baeldung/algorithms/moneywords/NumberWordConverterTest.java b/algorithms/src/test/java/com/baeldung/algorithms/moneywords/NumberWordConverterTest.java
new file mode 100644
index 0000000000..a4a169f158
--- /dev/null
+++ b/algorithms/src/test/java/com/baeldung/algorithms/moneywords/NumberWordConverterTest.java
@@ -0,0 +1,84 @@
+package com.baeldung.algorithms.moneywords;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.algorithms.numberwordconverter.NumberWordConverter;
+
+public class NumberWordConverterTest {
+
+ @Test
+ public void whenMoneyNegative_thenReturnInvalidInput() {
+ assertEquals(NumberWordConverter.INVALID_INPUT_GIVEN, NumberWordConverter.getMoneyIntoWords(-13));
+ }
+
+ @Test
+ public void whenZeroDollarsGiven_thenReturnEmptyString() {
+ assertEquals("", NumberWordConverter.getMoneyIntoWords(0));
+ }
+
+ @Test
+ public void whenOnlyDollarsGiven_thenReturnWords() {
+ assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
+ }
+
+ @Test
+ public void whenOnlyCentsGiven_thenReturnWords() {
+ assertEquals("sixty cents", NumberWordConverter.getMoneyIntoWords(0.6));
+ }
+
+ @Test
+ public void whenAlmostAMillioDollarsGiven_thenReturnWords() {
+ String expectedResult = "nine hundred ninety nine thousand nine hundred ninety nine dollars";
+ assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(999_999));
+ }
+
+ @Test
+ public void whenThirtyMillionDollarsGiven_thenReturnWords() {
+ String expectedResult = "thirty three million three hundred forty eight thousand nine hundred seventy eight dollars";
+ assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(33_348_978));
+ }
+
+ @Test
+ public void whenTwoBillionDollarsGiven_thenReturnWords() {
+ String expectedResult = "two billion one hundred thirty three million two hundred forty seven thousand eight hundred ten dollars";
+ assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(2_133_247_810));
+ }
+
+ @Test
+ public void whenGivenDollarsAndCents_thenReturnWords() {
+ String expectedResult = "nine hundred twenty four dollars and sixty cents";
+ assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(924.6));
+ }
+
+ @Test
+ public void whenOneDollarAndNoCents_thenReturnDollarSingular() {
+ assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
+ }
+
+ @Test
+ public void whenNoDollarsAndOneCent_thenReturnCentSingular() {
+ assertEquals("one cent", NumberWordConverter.getMoneyIntoWords(0.01));
+ }
+
+ @Test
+ public void whenNoDollarsAndTwoCents_thenReturnCentsPlural() {
+ assertEquals("two cents", NumberWordConverter.getMoneyIntoWords(0.02));
+ }
+
+ @Test
+ public void whenNoDollarsAndNinetyNineCents_thenReturnWords() {
+ assertEquals("ninety nine cents", NumberWordConverter.getMoneyIntoWords(0.99));
+ }
+
+ @Test
+ public void whenNoDollarsAndNineFiveNineCents_thenCorrectRounding() {
+ assertEquals("ninety six cents", NumberWordConverter.getMoneyIntoWords(0.959));
+ }
+
+ @Test
+ public void whenGivenDollarsAndCents_thenReturnWordsVersionTwo() {
+ assertEquals("three hundred ten £ 00/100", NumberWordConverter.getMoneyIntoWords("310"));
+ }
+}