Word Conversion

How to convert NUMBER into CHARACTERS using "COLLECTIONS and GENERICS" ..?

Eg:
Number: 76237
Word Conversion: Seventy Six Thousand Two Hundred Thirty Seven

Dishant Verma

Dishant Verma wrote:How to convert NUMBER into CHARACTERS using "COLLECTIONS and GENERICS" ..?

First you figure out how to do it "manually", without Java or any other programming language. You write down the steps--very basic, simple, precise, well-defined steps--with pencil and paper, and then you step through them by hand, and then when you find out you made some mistakes, you erase, and you correct, and you try again, and you repeat this process until you're pretty sure you have it right.

Then you convert those steps from English (or whatever language you're most comfortable with) into Java, and if collections and/or generics are a good fit for that conversion, you use them, and if not, you don't.

public class demo2 
{
	static String s="";

static Map<Integer, String> units=new HashMap<Integer, String>();
	static{units.put(0, "");units.put(1, "One");units.put(2, "Two");
	units.put(3, "Three");units.put(4, "Four");units.put(5, "Five");
	units.put(6, "Six");units.put(7, "Seven");units.put(8, "Eight");units.put(9, "Nine");
	units.put(10, "Ten");units.put(11, "Eleven");units.put(12, "Twelve");
	units.put(13, "Thirteen");units.put(14, "Fourteen");units.put(15, "Fifteen");
	units.put(16, "Sixteen");units.put(17, "Seventeen");units.put(18, "Eighteen");
	units.put(19, "Nineteen");}
	
	static Map<Integer, String> tens=new HashMap<Integer, String>();
	static{tens.put(0, "");tens.put(1, "");tens.put(2, "Twenty");tens.put(3, "Thirty");tens.put(4, "Fourty");
	tens.put(5, "Fifty");tens.put(6, "Sixty");tens.put(7, "Seventy");tens.put(8, "Eighty");tens.put(9, "Ninty");}
	
	static String convert_to_word(int value)
	{
		if(value<100)
			System.out.println(two_digit(value%100));
		else if(value<1000)
		{
			s=two_digit(value/100) +" Hundred and "+ two_digit(value%100);
		}
		else if(value<100000)
		{
			s=two_digit(value/1000)+" Thousand "+convert_to_word(value%1000);
		}
		return s;
	}
	static String two_digit(Integer a)
	{
		s = (a<20) ? (units.get(a)): (tens.get(a/10) +" "+ units.get(a % 10));
		return s;
	}
	public static void main(String[] args) 
	{
		Scanner sc=new Scanner(System.in);
		System.out.print("Enter any number: ");
		int i=sc.nextInt();
		demo2.convert_to_word(i);
		System.out.println("Word Conversion: "+s);
	}
}

"I have used this. But it is upto 99,999. But I want to enter any number having length 'n'....
And How can I eliminate if-else to make it more standardise.?"

And note that this site is NotACodeMill.(⇐click) You are expected to ShowSomeEffort(⇐click) and ask a specific question about the specific parts that are giving you trouble.

Okay, I'm sorry, this is too exasperating. I cannot help you. I hope that somebody else will have more patience than I.

Good luck!

Hey sorry Jeff I am new to this,
so I didn't knew this....

Dishant Verma wrote: . . . "I have used this. But it is upto 99,999. But I want to enter any number having length 'n'....
And How can I eliminate if-else to make it more standardise.?"

Back to your pencil and paper. You can use / and % repeatedly. But you would require a loop.
Also remember the value of a three-digit number is the value of the two-digit number with “howeverMany hundred” added. So you don’t need the > 100 test.
You would add spaces and “and” or hyphens (eg twenty-three) as appropriate.
I do not think you should put eleven, twelve, thirteen in the units Map; they need to be in a Map by themselves possibly called teens, because eleven to nineteen are pronounced differently from other numbers over ten.
I think you might need another Map with “hundred”, “thousand”, “million”, or similar in.

Please search this forum for threads about the meaning of the keyword static. We worry when we see so many static members in a class. There have been several other threads, all in the last week, which you would benefit from reading.

Dishant Verma wrote:I want to enter any number having length 'n'....

You are going to have to define what the max. of 'n' is, since there is no limit to the number someone can put in. For example, I could (theorieticaly) input a number that has a thousand digits. Do you really want to be able to handle that? I'm not even sure there are words for number that big...

Last time I looked in the Guiness Book of Records, they said the largest named number was the centillion, which has 601 digits.

Campbell Ritchie wrote:Last time I looked in the Guiness Book of Records, they said the largest named number was the centillion, which has 601 digits.

Googolplex anyone?

The biggest named number that's ever actually been used for something that I've ever heard of is Graham's Number. If we try to express it in scientific notation, the number of digits in the exponent is more than the number of atoms in the universe. (I think I'm actually even grossly understating there, but it's something along those lines.)

Campbell Ritchie wrote:Last time I looked in the Guiness Book of Records, they said the largest named number was the centillion, which has 601 digits.

Do all the numbers in between have names?

I'm pretty sure they don't all have names up to a googleplex, and this Graham's ?Number (which I had not heard of before) would be further proof you can't have names for all of them...

If it were me, I'd start by calling toString on the Integer. Then I'd read the String right to left a character at a time. This would require no math at all; the position of the character would tell me tens, hundreds, thousands.

But I agree completely with Campbell and Jeff: work it all out on paper first.

fred rosenberger wrote:

Campbell Ritchie wrote:Last time I looked in the Guiness Book of Records, they said the largest named number was the centillion, which has 601 digits.

Do all the numbers in between have names?

I'm pretty sure they don't all have names up to a googleplex, and this Graham's ?Number (which I had not heard of before) would be further proof you can't have names for all of them...

"Graham-less-1", "Graham-less-2", ...

Jeff Verdegan wrote:"Graham-less-1", "Graham-less-2"

I always liked the Ackermann function myself; so presumably a mathematician would allow A(G, G). I wonder if there's a Greek symbol for 'ridiculous'??

Winston

Jeff Verdegan wrote:If we try to express it in scientific notation, the number of digits in the exponent is more than the number of atoms in the universe.

Actually, I seem to remember that when 'Googol' was named, it had something to do with the number of protons in the known universe. But now, thanks to Hubble etc, it's probably a few hundred Googol. Perhaps we should just call it a 'Hubble' and let the IAU estimate it every year for us: Jobs for the boys, no?

Winston

Dennis Deems wrote: the position of the character would tell me tens, hundreds, thousands.

This is true, but you get into some oddities with number like "13". You don't want "13,000" to come out as "ten thousand three thousand"

Winston Gutkowski wrote:

Jeff Verdegan wrote:"Graham-less-1", "Graham-less-2"

I always liked the Ackermann function myself; so presumably a mathematician would allow A(G, G).

http://xkcd.com/207/
Panel 3.

fred rosenberger wrote:

Dennis Deems wrote: the position of the character would tell me tens, hundreds, thousands.

This is true, but you get into some oddities with number like "13". You don't want "13,000" to come out as "ten thousand three thousand"

That goes back to the whole "work it out on paper" bit.

"Oh, I've got it! This is actually pretty easy! (code, code, code.... test... WTF??) Okay, back to the pencil and paper to refine it for special cases..."

But 13000 is the same as 13 with thousand added.

Thanks guys for your concern.
I have done with this,with n=10 using ___?___:___

Regards:
Dishant