• 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
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

float to long typecasting

 
Greenhorn
Posts: 9
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi

i don't know how java stores floating point numbers in memory.(distribution of absolute and fraction digits)
a long takes 8 byte while a float takes 4 bytes only so why can't we typecast a float to a long implicitly. why widening isn't followed here in this case

and why a long can be type casted to a float implicitly while long takes 4 bytes more than float so there must be a loss of precision in this case; still it is allowed.
 
author
Posts: 23951
142
jQuery Eclipse IDE Firefox Browser VI Editor C++ Chrome Java Linux Windows
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Whether casting can be done implicitedly depends on the range -- not on the size in bytes or the precision. And since the range of the float is larger than the range of the long, a long can be casted to a float implicitedly, even though you may lose precision by doing so.

Henry
 
There were millions of the little blood suckers. But thanks to this tiny ad, I wasn't bitten once.
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic