Number To Words in Java With Error Handling

 Machine Problem

Create a program that converts numbers to words using Java programming language.

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Program Listing

/* Number_Words.java

 * Mr. Jake Rodriguez Pomperada,MAED-IT, MIT

 * www.jakerpomperada.com www.jakerpomperada.blogspot.com

 * jakerpomperada@gmail.com

 * Bacolod City, Negros Occidental Philippines

 */

import java.util.Scanner;

 public class Number_Words {

 

   public static void main(String[] args) {

int number = 0;

Scanner input = new Scanner(System.in);

    boolean valid;

    

    do {

    System.out.println();

    System.out.print("\tNumber To Words in Java\n\n");

    System.out.print("Enter Number: ");

 

   number = input.nextInt();

   valid = (number >= 1   && number <= 100000);

       System.out.println();

           

       if (number > 100000) {

    System.out.print("Number is out of range!\n");

   

       } else if (!valid) {

        System.out.println("Negative numbers, zero, and numbers greater than 100,000 are invalid input.");

         } 

       else {

System.out.print(numberToWord(number));

   }

   }while (!valid);

   System.out.println("\n");

  System.out.println("End of Program");

  input.close();

   }

 

   private static String numberToWord(int number) {

        

        String words = "";

        String unitsArray[] = { "zero", "one", "two", "three", "four", "five", "six", 

                      "seven", "eight", "nine", "ten", "eleven", "twelve",

                      "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", 

                      "eighteen", "nineteen" };

String tensArray[] = { "zero", "ten", "twenty", "thirty", "forty", "fifty",

                      "sixty", "seventy", "eighty", "ninety" };

 

if (number == 0) {

    return "zero";

}

if (number < 0) { 

          

           String numberStr = "" + number; 

           

           numberStr = numberStr.substring(1); 

          

           return "minus " + numberToWord(Integer.parseInt(numberStr)); 

        } 

      

if ((number / 1000) > 0) {

    words += numberToWord(number / 1000) + " thousand ";

    number %= 1000;

}

if ((number / 100) > 0) {

     words += numberToWord(number / 100) + " hundred ";

     number %= 100;

}

 

if (number > 0) {

    

     if (number < 20) { 

                    

                    words += unitsArray[number];

             } else { 

               

                words += tensArray[number / 10]; 

                if ((number % 10) > 0) {

    words += "-" + unitsArray[number % 10];

                }  

     }

          }

  return words;

   }

}