| Date: | Wed, 12 Apr 2006 15:44:29 +0300 |
| From: | Diomidis Spinellis <dds@aueb.gr> |
| Organization: | Athens University of Economics and Business |
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| Newsgroups: | comp.lang.java.programmer |
| Subject: | Re: when is it necessary to use suffix of literals? |
| References: | <1144844837.328276.120720@i39g2000cwa.googlegroups.com> |
| In-Reply-To: | <1144844837.328276.120720@i39g2000cwa.googlegroups.com> |
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xian_hong2046@hotmail.com wrote: > Hello, > > I'm a bit confused about when to use trailing characters such as "L", > "F" and "D" for literals. For example, if I have a double, then > naturally I'll have something like: > > double j = 42; > > Then why would I bother to use > > int j = 42D; > > Similarly for other trailing characters. You use the trailing suffixes when you want to force a calculation to be performed with the corresponding data type. For example: // Will print 0, because the result overflows a 32-bit int. System.out.println(0x80000000 * 0x100); // Will evaluate the result as a long and print 549755813888 System.out.println(0x80000000L * 0x100); -- Diomidis Spinellis Code Quality: The Open Source Perspective (Addison-Wesley 2006) http://www.spinellis.gr/codequality?cljp
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