• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Tim Cooke
  • Devaka Cooray
  • Ron McLeod
  • Jeanne Boyarsky
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
  • Tim Holloway
Bartenders:
  • Martijn Verburg
  • Frits Walraven
  • Himai Minh

Calculation Problem...

 
Greenhorn
Posts: 10
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I have problem with calculation of these numbers.
When I muliply 90000*.35 I get a value with decimals not the expected result, but the same if I do with 90000*.45 I get the correct output. Then again I have done similar calculation with 90000*.55 again I got wrong value(not the expected). We have tried one more combination of the decimal mulitplication .35 with 70000 which it gave the right result.

Can I know what could be the reason for this mismatch.

Code which we have executed is given below.

System.out.println((90000*.35));//31499.999999999996
System.out.println((90000*.45)); //40500.0
System.out.println((90000*.55)); //49500.00000000001
System.out.println((70000*.35));//24500.0

Thanks & Regards,

Joseph
 
Sheriff
Posts: 14691
16
Eclipse IDE VI Editor Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You'll always get precision problems with double.
Did you try using BigDecimal ?
 
Joseph Samuel
Greenhorn
Posts: 10
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Not yet tried using BigDecimal. Now the code which we have already been deployed in Production is using with double. We used double because it gives higher precission. But here it is creating problem. Problems like coming up less than 1 or more than 1 errors are coming.

BigDecimal will it solve this problem. BigDecimal can it be used for Arithmatic operation without any problem?
 
Christophe Verré
Sheriff
Posts: 14691
16
Eclipse IDE VI Editor Ubuntu
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You can set BigDecimal's rounding mode and scale. See the API for more.
 
You don't know me, but I've been looking all over the world for. Thanks to the help from this tiny ad:
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic