number formatting using recursion

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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.

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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statc

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Mar 10th, 2005

Re: number formatting using recursion

why complicate things?

Java Syntax (Toggle Plain Text)

import java.text.NumberFormat;

.......

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);
}

BountyX

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Posting Whiz in Training

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Mar 10th, 2005

Re: number formatting using recursion

I can help you, but I have school right now, but after I'll help you.

server_crash

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