This week's giveaway is in the Threads forum.
We're giving away four copies of Java Concurrency Live Lessons and have Doug Schmidt on-line!
See this thread for details.
Win a copy of Java Concurrency Live Lessons this week in the Threads forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic

beginner precision question  RSS feed

 
Tod Novak
Greenhorn
Posts: 13
MySQL Database PHP
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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.
 
Rob Spoor
Sheriff
Posts: 20904
81
Chrome Eclipse IDE Java Windows
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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.
 
Mark Vedder
Ranch Hand
Posts: 624
IntelliJ IDE Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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 exampledepot.com
[ May 15, 2008: Message edited by: Mark Vedder ]
 
Campbell Ritchie
Sheriff
Posts: 53779
128
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
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
Greenhorn
Posts: 13
MySQL Database PHP
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks all.

Got some reading to do

Appreciate the help.
 
arulk pillai
Author
Ranch Hand
Posts: 3404
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I would prefer using a DecimalFormat class with Log4J.


[ May 15, 2008: Message edited by: arulk pillai ]
 
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!