I*******o
发帖数: 53 | 1 public class C
{
public static final String A = C.A;
...
}
what's point of this... |
g*****g
发帖数: 34805 | 2 I don't know, I would use
import static C;
if it's for shorten name.
【在 I*******o 的大作中提到】
: public class C
: {
: public static final String A = C.A;
: ...
: }
: what's point of this...
|
A**o
发帖数: 1550 | 3 does it compile and does it work?
very interesting static hell.
【在 I*******o 的大作中提到】
: public class C
: {
: public static final String A = C.A;
: ...
: }
: what's point of this...
|
s***e
发帖数: 122 | 4 It's the same as A = A; or probably A = null; (how could we be sure???)
as a static final field, it has to be initialized when the class is loaded.
but i don't like such tricky thing.
【在 I*******o 的大作中提到】
: public class C
: {
: public static final String A = C.A;
: ...
: }
: what's point of this...
|
Z****e
发帖数: 2999 | 5 don't see the point, it's functionally equivalent to
public static final String A = null;
【在 I*******o 的大作中提到】
: public class C
: {
: public static final String A = C.A;
: ...
: }
: what's point of this...
|
b******y
发帖数: 9224 | |
I*******o
发帖数: 53 | 7 i saw this crap from someone's code when i was fixing a bug
it compiles!!
【在 A**o 的大作中提到】
: does it compile and does it work?
: very interesting static hell.
|
Z****e
发帖数: 2999 | 8 it's a valid statement, but meaningless
【在 I*******o 的大作中提到】
: i saw this crap from someone's code when i was fixing a bug
: it compiles!!
|
A**o
发帖数: 1550 | 9 haha, happy reading. :)
in that case, find the most senior or the most knowledgable employee
to find out if there is any story behind it.
【在 I*******o 的大作中提到】
: i saw this crap from someone's code when i was fixing a bug
: it compiles!!
|
I*******o
发帖数: 53 | 10 holly.... i was first surprised it complied!
maybe it's intended to be used as a placeholder.
【在 A**o 的大作中提到】
: haha, happy reading. :)
: in that case, find the most senior or the most knowledgable employee
: to find out if there is any story behind it.
|
Z****e
发帖数: 2999 | 11 here's my understanding:
variables on stack must be intialized; that's why if you define a variable
in a routine, and try to use it without initializing it, you'll get a
compiler error
variables on heap, like class variables, are preinitialized with null/0/
false when the memory space for the class is allocated; that's why you can
make reference to it even without initializing it. so when compiler sees
that statement, it will just try to assign the preinitialized value of A to
A again, which is
【在 I*******o 的大作中提到】
: holly.... i was first surprised it complied!
: maybe it's intended to be used as a placeholder.
|
S*********t
发帖数: 78 | 12 it is defined final.
so this code is doing nothing and it is confusing people, which should be
avoided.
to
【在 Z****e 的大作中提到】
: here's my understanding:
: variables on stack must be intialized; that's why if you define a variable
: in a routine, and try to use it without initializing it, you'll get a
: compiler error
: variables on heap, like class variables, are preinitialized with null/0/
: false when the memory space for the class is allocated; that's why you can
: make reference to it even without initializing it. so when compiler sees
: that statement, it will just try to assign the preinitialized value of A to
: A again, which is
|
Z****e
发帖数: 2999 | 13 with or without final, the line of code is doing nothing; adding a final
further rendered the vairable uselss because it can no longer be assigned to
any other value
【在 S*********t 的大作中提到】
: it is defined final.
: so this code is doing nothing and it is confusing people, which should be
: avoided.
:
: to
|
