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Posted to user-java@ibatis.apache.org by Nicholoz Koka Kiknadze <ki...@gmail.com> on 2008/07/04 14:19:12 UTC
Result HashMap elemnt order
Hi,
I get results using resultClass="java.util.HashMap" and I expected that if I
iterate values of the HashMap the order will correspond to the order in my
fields. However it does not. Is that normal behavior?
In other words I have 'Select f1, f2, f3 from Blah', and iterating in the
HashMap values I get something like f2,f1,f3
iBatis version 2.3.0.677.
Tya
Re: Result HashMap elemnt order
Posted by Nicholoz Koka Kiknadze <ki...@gmail.com>.
Aaah, many thanks, so I think I'd better try with LinkedHashMap. Will test
it in the evening.
On Fri, Jul 4, 2008 at 4:56 PM, Larry Meadors <la...@gmail.com>
wrote:
> Maps in Java are not ordered.
>
> public static void main(String[] args) {
> Map m = new HashMap();
> m.put("this", "this");
> m.put("is", "is");
> m.put("a", "a");
> m.put("test", "test");
> for(Object o:m.values()) System.out.println(o);
> }
>
> The output on my box is:
>
> a
> is
> this
> test
>
> Larry
>
>
> On Fri, Jul 4, 2008 at 6:19 AM, Nicholoz Koka Kiknadze
> <ki...@gmail.com> wrote:
> > Hi,
> >
> > I get results using resultClass="java.util.HashMap" and I expected that
> if I
> > iterate values of the HashMap the order will correspond to the order in
> my
> > fields. However it does not. Is that normal behavior?
> >
> > In other words I have 'Select f1, f2, f3 from Blah', and iterating in the
> > HashMap values I get something like f2,f1,f3
> >
> > iBatis version 2.3.0.677.
> >
> > Tya
> >
> >
>
Re: Result HashMap elemnt order
Posted by Larry Meadors <la...@gmail.com>.
Maps in Java are not ordered.
public static void main(String[] args) {
Map m = new HashMap();
m.put("this", "this");
m.put("is", "is");
m.put("a", "a");
m.put("test", "test");
for(Object o:m.values()) System.out.println(o);
}
The output on my box is:
a
is
this
test
Larry
On Fri, Jul 4, 2008 at 6:19 AM, Nicholoz Koka Kiknadze
<ki...@gmail.com> wrote:
> Hi,
>
> I get results using resultClass="java.util.HashMap" and I expected that if I
> iterate values of the HashMap the order will correspond to the order in my
> fields. However it does not. Is that normal behavior?
>
> In other words I have 'Select f1, f2, f3 from Blah', and iterating in the
> HashMap values I get something like f2,f1,f3
>
> iBatis version 2.3.0.677.
>
> Tya
>
>
Re: Result HashMap elemnt order
Posted by Larry Meadors <la...@gmail.com>.
Neils FTW: The same code with that map type produces this output:
this
is
a
test
Cool trick!
Larry
On Fri, Jul 4, 2008 at 7:05 AM, Niels Beekman <n....@wis.nl> wrote:
> Use java.util.LinkedHashMap
RE: Result HashMap elemnt order
Posted by Niels Beekman <n....@wis.nl>.
Use java.util.LinkedHashMap
________________________________
From: Nicholoz Koka Kiknadze [mailto:kiknadze@gmail.com]
Sent: Friday, July 04, 2008 2:19 PM
To: user-java@ibatis.apache.org
Subject: Result HashMap elemnt order
Hi,
I get results using resultClass="java.util.HashMap" and I expected that
if I iterate values of the HashMap the order will correspond to the
order in my fields. However it does not. Is that normal behavior?
In other words I have 'Select f1, f2, f3 from Blah', and iterating in
the HashMap values I get something like f2,f1,f3
iBatis version 2.3.0.677.
Tya