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Index › Programming Questions & Help › Syntax Questions › accessing class info by name
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accessing class info by name (Read 249 times)
3kiwis
accessing class info by name
Jan 11th, 2009, 4:58pm  
Hi, I don't even know how to search for it.
I've got a class myClass with several vars in it var1, var2, var3...var100
I also have a file.txt in which I find something like var13 25.
What I want to do is read first char [var13] and so do myClass.var13=25.
As you can see I can't access the var directly as I don't know which one it will be and I'm trying to avoid switch.

In flash I'd do myClass[var], where var="var13", and it would work.

Can anybody help? Thanks!
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eskimoblood
Re: accessing class info by name
Reply #1 - Jan 11th, 2009, 5:16pm  
You cant to this in JAVA, but you can use a Hashmap to store your values (http://processing.org/reference/HashMap.html)
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Andreas Köberle {eskimoblood}
222550793  
3kiwis
Re: accessing class info by name
Reply #2 - Jan 11th, 2009, 5:22pm  
Well, thanks but in fact this class is given to me through a library, so I can't turn it into a hashmap.
I'm trying to access to notes in jmEtude and I want to read a sequence, as C5 A4 G4. I'd like to read C5 and use e.C5, A4 and use e.A4, and so on.

Any other suggestion?
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eskimoblood
Re: accessing class info by name
Reply #3 - Jan 11th, 2009, 6:05pm  
Mhmm, you can store all vars of your class in a hashmap and access them by the loaded string.

Code:

HashMap sequences= new HashMap();
sequences.put("C5 ", e.C5 );
sequences.get(varC5) = loadedvalue
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Andreas Köberle {eskimoblood}
222550793  
PhiLho 
Re: accessing class info by name
Reply #4 - Jan 11th, 2009, 11:21pm  
While this is fundamentally non-OO, one can be more pragmatic in Processing than in Java...

To answer directly to the original request, you can use reflection, particularly the Class class, particularly the getDeclaredField method. (Not tried it!)
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