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beginner precision question

Tod Novak

Joined: Dec 14, 2006
Posts: 13

Below is just a sample of what I'm trying to get a grasp on.

I'm trying to figure out how to get both places to display after the decimal when both are zeros.

Again, this is just to illustrate.

If I input 1000 ($10.00) as price, I would expect to get back 12.00 as the result, not 12.0

Thanks in advance.

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Rob Spoor

Joined: Oct 27, 2005
Posts: 20271

Use System.out.printf instead of System.out.println. Check PrintWriter.printf for more information; keep in mind it does NOT print an enter unless you tell it to.

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Mark Vedder
Ranch Hand

Joined: Dec 17, 2003
Posts: 624

Take a look at the JavaDoc for the DecimalFormat class. It is a class used to format Decimal numbers like you are trying to do. The DecimalFormat class is a subclass of the NumberFormat.

You can then look at Java Tutorial on Formatting Numeric Output. That lesson first talks about the System class' printf() and format() methods, and then the DecimalFormat class.

You can also find examples of using the DecimalFormat class on
[ May 15, 2008: Message edited by: Mark Vedder ]
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46345
Agree with Rob Prime. More details about the tags with % in the Formatter clas API documentation. Use %n instead of \n after printf to go onto a new line.
Tod Novak

Joined: Dec 14, 2006
Posts: 13

Thanks all.

Got some reading to do

Appreciate the help.
arulk pillai
Ranch Hand

Joined: May 31, 2007
Posts: 3371
I would prefer using a DecimalFormat class with Log4J.

[ May 15, 2008: Message edited by: arulk pillai ]

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