Question

Formatting a String of numbers to look like an amount

Asked by: StephenSpeaks

I've been Googling around and all the solutions I can find pertain to the String formatter in Java 1.5... However, I'm using Java 1.4.2 so I can't exactly apply those solutions.

Is there a graceful way to handle this kind of formatting...?

String x = "0000002136608" (the length of the string is always 13 characters)

I want this to be formatted to look like this: "21,366.08"

So basically, how do you format in such a way that:

1) Leading zeroes are dropped
2) The last two digits are placed to the right of the decimal point
3) The digits to the left are separated by a comma after every 3 characters

More examples:

"0000001076855" = "10,768.55"
"0000000536777" = "5,367.77"
"0000000536163" = "5,361.63"

Thanks!

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Asked On
2009-03-11 at 19:29:23ID24222379
Tags

java

,

string formatting

,

numbers

Topic

Java Programming Language

Participating Experts
2
Points
125
Comments
10

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Answers

 

by: objectsPosted on 2009-03-11 at 19:36:59ID: 23864297

convert it to n int

http://helpdesk.objects.com.au/java/how-to-convert-a-string-to-an-int

divide it by 100 and store value as a double
then use a DecimalFormat to format it as a string

http://helpdesk.objects.com.au/java/how-to-format-a-double-as-a-string


 

by: quincydudePosted on 2009-03-11 at 19:38:03ID: 23864304

can you use DecimalFormat
http://java.sun.com/j2se/1.4.2/docs/api/java/text/DecimalFormat.html

just type cast  your string to number

 

by: quincydudePosted on 2009-03-11 at 19:39:17ID: 23864311

oops I used the wrong term, it should be convert not type cast :p

 

by: StephenSpeaksPosted on 2009-03-11 at 19:41:00ID: 23864318

Am I using the correct DecimalFormat for this?

DecimalFormat myFormatter = new DecimalFormat("##,###,###,###.##");

 

by: objectsPosted on 2009-03-11 at 19:42:23ID: 23864325

looks good

 

by: StephenSpeaksPosted on 2009-03-11 at 19:49:09ID: 23864347

So here's what's happening for example:

            double xx = Integer.parseInt("000000002349000")/100;
            DecimalFormat myFormatter = new DecimalFormat("##,###,###,###.##");
            String output = myFormatter.format(xx);

This is the value of xx = 23490.0

This is the value of output = "23,490"

I'm still missing something... wonder what's wrong.

 

by: objectsPosted on 2009-03-11 at 19:53:23ID: 23864363

>             double xx = Integer.parseInt("000000002349000")/100;
>             DecimalFormat myFormatter = new DecimalFormat("##,###,###,###.##");

change that to:

            double xx = Integer.parseInt("000000002349000")/100.0;
            DecimalFormat myFormatter = new DecimalFormat("##,###,###,###.00");

 

by: StephenSpeaksPosted on 2009-03-11 at 20:02:21ID: 23864395

Bingo! It worked!

I can understand the change from "##,###,###,###.##" to "##,###,###,###.00" but why divide by "100.0" instead of "100" though?

 

by: objectsPosted on 2009-03-11 at 20:03:24ID: 23864401

so it doesn't do an integer division

 

by: StephenSpeaksPosted on 2009-03-11 at 20:05:20ID: 23864410

I see... Thanks!

20120131-EE-VQP-002

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