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Incrementing and decrementing.
Joined: Dec 21, 2007
Aug 17, 2010 10:34:33
Am I understanding this correctly...?
int myInt = 1; System.out.print("My int is :" + myInt++);
will print "My int is : 1
The reason for this is because the compiler acts like this :
use the variable, then increment it after
int myInt = 1; System.out.print("My int is :" + ++myInt);
will print "My int is : 2
The reason for this is the compiler acts like this :
increment the variable BEFORE using it
The compiler therefore must be smart enough to understand the scope of the variable, so it knows when it can increment it?
I'm just trying to understand these operators correctly
Kind Regards, James. OCPJP 1.6 ||
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author and iconoclast
Joined: Jul 08, 2003
Aug 17, 2010 10:43:30
Your understanding is correct. The
Language Spec includes some detailed and highly technical language about precisely when the increment/decrement can happen in either case, but it boils down to just what you've said here.
[Jess in Action]
Joined: Apr 12, 2009
Aug 17, 2010 12:13:38
Also see this
Joined: Aug 07, 2010
Aug 20, 2010 19:57:52
100% Correct .......
MCSA 2003 | Preparing For OCPJP/SCJP6
subject: Incrementing and decrementing.
Mock Exam doubt increment expresion
Superclass and subclass reference type confusion
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Doubt in the output of this program.
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