build variable-names out of strings

[bateman23]

Hi,

is there any posibility in java to build variable names out of strings at runtime?
I got and array of values and want to create variables out of them:

[b]The Array:[/b]
String my_array[] = new String[] {"one", "two"};
[b]And i need to build this two variables:[/b]
error_one="Value";
error_two="Value";
..where the parts "one" and "two" are taken out of the array.

Can this be done in java?

despite crossposting is not welcome, i'm posting this question in the java-forum.
In the jsp-forum nobody seems to know an answer.
Anyway: For more background information you can find the thread at:

http://tek-tips.com/viewthread.cfm?qid=1032157&page=1

Hopefully somebody can give me some hints or an answer. Any help would be greatly appreceated. Thank you very much in advance,
Daniel

 

[Bones3]

No...

What's wrong with

my_array[0] = "Value";
my_array[1] = "Value";

?

Variable names are trashed by the compiler anyway. During runtime, a variable name means nothing.

-Bones

 

[sedj]

bateman23 - I showed you the closest representation of your PHP script to what it would look like in JSP/Java - as Bones3 says - you cannot build variables at runtime - its not a scripting language !

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[bateman23]

Thanks to both of you. So it seems i have to think about using arrays instead.. and trying to forget my scripting-style of thinking
But anyway i'll miss the feature of building vars at runtime...

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http://www.daniel-purucker.de/

 

[ishnid]

<A little OT, cause it's not really related to Java>
IMO - that particular `scripting-style' of thinking is a pretty dangerous thing to adopt - and this is coming from a Perl fan. Whether the language lets you or not, it's generally much safer to keep related variables in a related data structure (such as an Array or a Hashtable), rather than dynamically creating unrelated datastructures on the fly to hold related data. The risk of clobbering variables elsewhere in your program is just too high - and it's really, really difficult to track down the bug if/when it all goes horribly wrong (this is exactly the reason that the PHP folks decided to turn off register_globals by default).

There's a good article on it here. It's written about Perl, but the concepts apply to other languages too.

 

[bateman23]

Very nicely written article. And despite it doesn't exactly match my situation it makes things just even more clear: Although making things at first glance a lot easier, dynamic named vars are not the best thing to use...
I hope i'm able to solve the problem in another way (like arrays) and don't regret the sweet poison of "scipting style" to long

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Visit me @:

http://www.daniel-purucker.de/