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  Object returning it's Class  (Read 1161 times)
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Offline jDeng

Senior Newbie


Projects: 1



« Posted 2012-03-11 00:17:31 »

Is it possible to have the Object return it's Class name? I'm trying to use the .Class name as a key for a hash map and have it store every object under that Class.
I tried Casting the object to Class, but unfortunately that returned an error. Any help would be appreciated!
Offline Riven
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« Reply #1 - Posted 2012-03-11 00:26:44 »

1  
anything.getClass().getName()

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Offline zngga
« Reply #2 - Posted 2012-03-11 00:57:07 »

if your going to use a hashmap do it like this:

HashMap<String, yourClass> map = new HashMap<String, yourClass>();

then in your class have a method that returns the name:

private final String NAME;
public yourClass(String name)
{
    NAME = name;
{
public String getName()
{
    return NAME;
}

then do this:

YourClass class = new yourClass("name");
map.put(class.getName(), class);

[edit] Then for searching for the class you want do something like this:

public yourClass findClass(String name)
{
    yourClass class = (yourClass) map.get(name);
    return class;
}

of course this is all pseudo code.

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Offline ra4king

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« Reply #3 - Posted 2012-03-11 01:21:27 »

public yourClass findClass(String name)
{
    yourClass class = (yourClass) map.get(name);
    return class;
}
Ehhhh what's the point of that method? There is no need to cast.... Tongue

Also, "class" is a reserved keyword, you cannot use it Wink

Anyway, Riven's method is better Smiley

Offline zngga
« Reply #4 - Posted 2012-03-11 01:41:58 »

public yourClass findClass(String name)
{
    yourClass class = (yourClass) map.get(name);
    return class;
}
Ehhhh what's the point of that method? There is no need to cast.... Tongue

Also, "class" is a reserved keyword, you cannot use it Wink

Anyway, Riven's method is better Smiley

I said it was pseudo code... and I always add the cast just in case (it is a HashMap were talking about here) it also throws an error if it can't cast so you can catch it and do something about it, I never design my programs to have to use that but it is nice to have anyway.

My code never has bugs... it just develops unexpected features!
Offline ra4king

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Medals: 355
Projects: 3
Exp: 5 years


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« Reply #5 - Posted 2012-03-11 01:43:28 »

Just in case what? Generics don't suddenly "not work" Wink

Offline jDeng

Senior Newbie


Projects: 1



« Reply #6 - Posted 2012-03-11 01:48:38 »

Thanks guys! Appreciate the quick help!
Offline ReBirth
« Reply #7 - Posted 2012-03-11 03:53:18 »

In reverse way, there's also "instanceof".

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