Does Java's standard math library offer a function to convert numbers to their word representations?

How to convert number to words in java

Background

Currently, a rudimentary mechanism is in place to convert numbers to words using static arrays and translating them based on the number's size into an English text. However, this approach runs into challenges with exceptionally large numbers.

<br>10183 = Ten thousand one hundred eighty three<br>90 = Ninety<br>5888 = Five thousand eight hundred eighty eight<br>

Question

Is there a straightforward function in any of the math libraries that can be utilized for this purpose?

Answer

Here is the code, I don't think there is any method in SE.

It essentially converts a number to a string, parses it, and associates it with its weight.

For example

<br>1000<br>

1 is treated as a thousand position, and 1 is mapped to "one" and thousand due to its position.

Here is the code from the website:

English

<br>import java.text.DecimalFormat;</p>
<p>public class EnglishNumberToWords {</p>
<p>private static final String[] tensNames = {</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">"",
" ten",
" twenty",
" thirty",
" forty",
" fifty",
" sixty",
" seventy",
" eighty",
" ninety"

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};

private static final String[] numNames = {

"",
" one",
" two",
" three",
" four",
" five",
" six",
" seven",
" eight",
" nine",
" ten",
" eleven",
" twelve",
" thirteen",
" fourteen",
" fifteen",
" sixteen",
" seventeen",
" eighteen",
" nineteen"

};

private EnglishNumberToWords() {}

private static String convertLessThanOneThousand(int number) {

String soFar;

if (number % 100 < 20){
  soFar = numNames[number % 100];
  number /= 100;
}
else {
  soFar = numNames[number % 10];
  number /= 10;

  soFar = tensNames[number % 10] + soFar;
  number /= 10;
}
if (number == 0) return soFar;
return numNames[number] + " hundred" + soFar;

}

public static String convert(long number) {

// 0 to 999 999 999 999
if (number == 0) { return "zero"; }

String snumber = Long.toString(number);

// pad with "0"
String mask = "000000000000";
DecimalFormat df = new DecimalFormat(mask);
snumber = df.format(number);

// XXXnnnnnnnnn
int billions = Integer.parseInt(snumber.substring(0,3));
// nnnXXXnnnnnn
int millions  = Integer.parseInt(snumber.substring(3,6));
// nnnnnnXXXnnn
int hundredThousands = Integer.parseInt(snumber.substring(6,9));
// nnnnnnnnnXXX
int thousands = Integer.parseInt(snumber.substring(9,12));

String tradBillions;
switch (billions) {
case 0:
  tradBillions = "";
  break;
case 1 :
  tradBillions = convertLessThanOneThousand(billions)
  + " billion ";
  break;
default :
  tradBillions = convertLessThanOneThousand(billions)
  + " billion ";
}
String result =  tradBillions;

String tradMillions;
switch (millions) {
case 0:
  tradMillions = "";
  break;
case 1 :
  tradMillions = convertLessThanOneThousand(millions)
     + " million ";
  break;
default :
  tradMillions = convertLessThanOneThousand(millions)
     + " million ";
}
result =  result + tradMillions;

String tradHundredThousands;
switch (hundredThousands) {
case 0:
  tradHundredThousands = "";
  break;
case 1 :
  tradHundredThousands = "one thousand ";
  break;
default :
  tradHundredThousands = convertLessThanOneThousand(hundredThousands)
     + " thousand ";
}
result =  result + tradHundredThousands;

String tradThousand;
tradThousand = convertLessThanOneThousand(thousands);
result =  result + tradThousand;

// remove extra spaces!
return result.replaceAll("^\s+", "").replaceAll("\b\s{2,}\b", " ");

}

/**

• testing
• @param args
  */

public static void main(String[] args) {

System.out.println("*** " + EnglishNumberToWords.convert(0));
System.out.println("*** " + EnglishNumberToWords.convert(1));
System.out.println("*** " + EnglishNumberToWords.convert(16));
System.out.println("*** " + EnglishNumberToWords.convert(100));
System.out.println("*** " + EnglishNumberToWords.convert(118));
System.out.println("*** " + EnglishNumberToWords.convert(200));
System.out.println("*** " + EnglishNumberToWords.convert(219));
System.out.println("*** " + EnglishNumberToWords.convert(800));
System.out.println("*** " + EnglishNumberToWords.convert(801));
System.out.println("*** " + EnglishNumberToWords.convert(1316));
System.out.println("*** " + EnglishNumberToWords.convert(1000000));
System.out.println("*** " + EnglishNumberToWords.convert(2000000));
System.out.println("*** " + EnglishNumberToWords.convert(3000200));
System.out.println("*** " + EnglishNumberToWords.convert(700000));
System.out.println("*** " + EnglishNumberToWords.convert(9000000));
System.out.println("*** " + EnglishNumberToWords.convert(9001000));
System.out.println("*** " + EnglishNumberToWords.convert(123456789));
System.out.println("*** " + EnglishNumberToWords.convert(2147483647));
System.out.println("*** " + EnglishNumberToWords.convert(3000000010L));

/*
 *** zero
 *** one
 *** sixteen
 *** one hundred
 *** one hundred eighteen
 *** two hundred
 *** two hundred nineteen
 *** eight hundred
 *** eight hundred one
 *** one thousand three hundred sixteen
 *** one million
 *** two millions
 *** three millions two hundred
 *** seven hundred thousand
 *** nine millions
 *** nine millions one thousand
 *** one hundred twenty three millions four hundred
 **      fifty six thousand seven hundred eighty nine
 *** two billion one hundred forty seven millions
 **      four hundred eighty three thousand six hundred forty seven
 *** three billion ten
 **/

}
}

Français
quite different than the english version but french is a lot more difficult!

<br>package com.rgagnon.howto;</p>
<p>import java.text.*;</p>
<p>class FrenchNumberToWords {<br>  private static final String[] dizaineNames = {</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">"",
"",
"vingt",
"trente",
"quarante",
"cinquante",
"soixante",
"soixante",
"quatre-vingt",
"quatre-vingt"

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