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Index › Programming Questions & Help › Syntax Questions › Function in Function

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Function in Function (Read 962 times)

fejngold

Function in Function
Dec 29^th, 2009, 11:14am

Hej everybody,
I'm having a problem with returning different types. Is it possible to have a kind of subfunction in a function?

My Class CData sorts an array of objects containing country informations. Let's assume I sorted all objects according to the iso country name. On the one hand I want to return a String containing the first iso country name, on the other hand the whole object.

The result would be like this:

Code:

CData.FirstIsoName_String();
CData.FirstIsoName_Object();
...

All in all I'm producing a bunch of functions (There a lot more informations to return...).

Is there any way to return different values in one function?

A little bit like...

Code:

CData.FirstIsoName().returnString();
CData.FirstIsoName().returnObject();

Thanks, Fejngold

PhiLho

Re: Function in Function
Reply #1 - Dec 29^th, 2009, 11:51am

I am not sure I get your question.

First, let's eliminate one question: no, in Java, you cannot have a sub-function defined in a function.

Now, you can have sub-objects.
Somehow, that's what you describe: your CData has an array of sub-objects.
So, I would rename your function, from FirstIsoName() to FirstIsoCountry(), returning the corresponding object. This object (say, of Country class) can have methods returning the country name, the country code, etc.

So, let say you have cdata, an object of type CData.
You can call: cdata.sort() and then cdata.getFirstIsoCountry() to get the whole first object, and cdata.getFirstIsoCountry().getName(); to get its name (or by using an intermediary variable).

I hope I answered your question.

fejngold YaBB Newbies Offline Posts: 14	Re: Function in Function Reply #2 - Dec 30^th, 2009, 4:35am Thanks PhiLho, this works fine. I now return the object and accessing the country name (or whatever) with the objects method. I'm still wondering why I didn't tested this before.

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