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Format a string as currency

Hi. Yes this is classwork but I'm not asking anyone to do it. In fact, it's done. Except for formatting one field as currency. This is not a requirement of my program, I just want to do it. The data I have is String. It is the price of a book. How do I format it to currency?

Thanks

Zeroshade

If the price is declared as a string you could run a loop through the string using .charAt(). Then add a dollar sign at the first character and decimal into the string before the last 2 characters.

imladris

How about:

//assume bookprice contains the string you have
//which I assume is an ASCII string of digits
String price="$"+bookprice.substring(0,bookprice.length()-2)+"."+bookprice.substring(bookprice.length()-2);

CEHJ

Try

double price = 2.989;
String symbol = NumberFormat.getCurrency().getSymbol();
NumberFormat nf = NumberFormat.getInstance();
System.out.println(symbol + nf.format(price));

CEHJ

>>NumberFormat nf = NumberFormat.getInstance();

should have been

>>NumberFormat nf = NumberFormat.getCurrencyInstance();

dds110

ASKER

I have done the first two suggestions. The suggestion from CEHJ, I'm sure it works but, the data is String: not double. Isn't there a way to "TypeCast" one data type to another?

Thanks

ASKER CERTIFIED SOLUTION

quickhippo

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CEHJ

This is all you need actually:

String price = "2.989";
NumberFormat nf = NumberFormat.getCurrencyInstance();
System.out.println(nf.format(Double.parseDouble(price)));

dds110

ASKER

quickhippo and CEHJ get the points for this. Both suggestions were ok. The points for this Q will go to quickhippo. CEHJ, Look for a new post for your points.

Thanks