FigureInWords

import java.util.Scanner;

public class FigureInWords {
	String string;
	String[] units = {"","One", "Two", "Three", "Four", "Five", "Six", "Seven","Eight","Nine"};
	String[] teens ={"Ten", "Eleven", "Twelve", "Thirteen", "Fourteen","Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"};
	String[] tens = {"Twenty", "Thirty", "Fourty", "Fifty", "Sixty","Seventy", "Eighty", "Ninety"};
	String[] hun = {"hundred", "thousand", "hundred thousand", "million","billion"};
	String[] zero = {"zero"};
	
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		FigureInWords m = new FigureInWords();
		System.out.print("Enter a number to convert to words (or 'done' to quit):"+scan.nextInt());
		//s = sc.next();
		//int n = Integer.parseInt(s);
		int n = scan.nextInt();
		String inwords = m.convert(n);
		System.out.println("Value is "+inwords);		       
	}
	public String convert(int number) {
		int n = 1;
		int mandata;
		string ="";
		while(number!=0)
		{
			switch (n) {
			case 1: mandata = number%100;
			pass(mandata);
			if (number>100 && number%100!=0) {
				show("and ");
			}
				number/=100;
				break;
			case 2:mandata = number%10;
			if (mandata!=0) {
				show(" ");
				 show(hun[0]);
				 show(" ");
				 pass(mandata);				
			} 
			number/=10;
			break;
			case 3:mandata = number%100;
			if (mandata!=0) {
				show(" ");
				 show(hun[1]);
				 show(" ");
				 pass(mandata);				
			} 
			number/=100;
			break;
			case 4:mandata = number%100;
			if (mandata!=0) {
				show(" ");
				 show(hun[2]);
				 show(" ");
				 pass(mandata);				
			} 
			number/=100;
			break;
			case 5:mandata = number%100;
			if (mandata!=0) {
				show(" ");
				 show(hun[2]);
				 show(" ");
				 pass(mandata);				
			} 
			number/=100;
			break;
			case 6:mandata = number%1000;
			if (mandata>100000) {
				show(" ");
				 show(hun[4]);
				 show(" ");
				 pass(mandata);				
			} 
			number/=1000;
			break;
			default:
				break;
			}n++;
		}
		return string;		
	}
	public void pass(int number) {
		int word, q;
		if (number==0) {
			show(zero[0]);
		}
		if (number>0 && number < 10) {
			show(units[number]);
		}
		if (number>9 && number<20) {
			show(teens[number-10]);
		}
		if (number>19) {
			word = number%10;
			if (word ==0) {
				q=number/10;
				show(tens[q-2]);
			}
			else {
				q=number/10;
				show(units[word]);
				show(" ");
				show(tens[q-2]);
			}
		}
	}
	private void show(String s) {
		String st;
		st = string;		
		string = s;
		string+=st;
	}
}