Win a copy of Clojure in Action this week in the Clojure forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Java Numbers

 
Edmond Corrola
Greenhorn
Posts: 15
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'm reading in positive numbers from a file, I need to do some processing but there's no telling how big these positive numbers will be. So far it looks like up to a max of 10 digits. I've tried declaring different variables to hold them (int, float, long, BigInteger, etc..) but I get a compile time error of "number too large" when I test an integer value of 10 digits on them. What can I use to hold huge numbers?

p.s. I was thinking of just storing them as a string, than processing the parts I need by breaking the string up (because the number represents an address which I need to break into bits). Does this sound like a better solution?
 
Ernest Friedman-Hill
author and iconoclast
Marshal
Pie
Posts: 24204
34
Chrome Eclipse IDE Mac OS X
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
If it's a compile-time error, that suggests you're writing something like

long x = 123456789012345;

and getting the error. That's because to write a long literal in Java code, you have to mark the actual literal as being a long by appending a letter 'L':

long x = 123456789012345L;

Try it!
 
Edmond Corrola
Greenhorn
Posts: 15
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
thanks, in C i always type casted it so i wouldn't have to remember. I completely forgot that I needed to do that. It wasn't making sense that I couldn't use a 10 digit number for a "long".
[ October 24, 2008: Message edited by: Edmond Corrola ]
 
Rob Spoor
Sheriff
Pie
Posts: 20380
46
Chrome Eclipse IDE Java Windows
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
And if long becomes too small, you can always use java.math.BigInteger. Not as fast but at least it can hold arbitrarily large numbers.
 
I agree. Here's the link: http://aspose.com/file-tools
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic