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number formatting using recursion

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Join Date: Mar 2005

Posts: 2

Reputation: statc is an unknown quantity at this point

Solved Threads: 0

statc

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Newbie Poster

number formatting using recursion

Mar 9th, 2005

hi, i was wondering if anyone could help me out? i have this project in my java class where i need to format an integer to a string with commas (ex:1000000->1,000,000) using recursion. I've tried it for 4 class periods and i just can't figure it out. If you feel guilty by giving me just the answer feel free to give me a tutorial on recursion so that i get the answer and understand it better.
I figured some people woudl like to see what i have now.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
static String insertCommas(int num)
{
         int rem=0;
         String str="";
        if(num<1000)
                        {
                        str+=num;  
                        return str;
                        }
                        else
                        {
                        str+=num+",";
                        insertCommas(num%1000);
                        }
                       return str;
}
static String insertCommas(int num)
{
         int rem=0;
         String str="";
        if(num<1000)
                        {
                        str+=num;  
                        return str;
                        }
                        else
                        {
                        str+=num+",";
                        insertCommas(num%1000);
                        }
                       return str;
}

Last edited by statc; Mar 9th, 2005 at 10:22 pm. Reason: added code

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Join Date: Mar 2004

Posts: 219

Reputation: BountyX is an unknown quantity at this point

Solved Threads: 7

BountyX

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Code Guru

Re: number formatting using recursion

Mar 10th, 2005

why complicate things?

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Java Syntax (Toggle Plain Text)

import java.text.NumberFormat;

.......

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
 static String insertCommas(int num)
{
		 return NumberFormat.getInstance().format(num);
}
 static String insertCommas(int num)
{
		 return NumberFormat.getInstance().format(num);
}