Not able to copy all properties using properties.putAll() method.

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Sonal - 06 Dec 2007 05:32 GMT

Hi All,

Properties props;
Properties props_;

props_.putAll(props);

I want to copy all properties from "props" object to "props_".But it
fails to copy all values.
Please can any one tell me the reason ?

Thanks.

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Manish Pandit - 06 Dec 2007 05:59 GMT

> Hi All,
>
[quoted text clipped - 8 lines]
>
> Thanks.

Are you sure props is not empty? I wrote a little snippet to check it
out:

Properties p = new Properties();
p.put("A","a");
p.put("B","b");
Properties copy = new Properties();
copy.putAll(p);
System.out.println(p);
System.out.println(copy);

And here is the output:

{A=a, B=b}
{A=a, B=b}

-cheers,
Manish

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Daniele Futtorovic - 06 Dec 2007 22:45 GMT

> Hi All,
>
[quoted text clipped - 6 lines]
> fails to copy all values.
> Please can any one tell me the reason ?

Possibly because of the defaults. putAll(Map) will iterate the source. I
don't see entrySet() or the like overridden in Properties, so it will be
Hashtable's version, which won't include the defaults.

DF.

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Lew - 07 Dec 2007 03:08 GMT

>> Hi All,
>>
[quoted text clipped - 10 lines]
> don't see entrySet() or the like overridden in Properties, so it will be
> Hashtable's version, which won't include the defaults.

Maybe there's some help to be had from
<http://java.sun.com/javase/6/docs/api/java/util/Properties.html#Properties(java.
util.Properties)>

Signature

Lew

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Not able to copy all properties using properties.putAll() method.

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