Vectors and objects

**Matty Alan** · May 10th, 2011, 11:28 AM

Basicly it like this. I have a class full of methods and variables (like any other normal class) and I wanted to create a dynamic array of these instances. but iv'e come accross a floor in my plan where once I load the object of the class into the vector I can not access anything inside the class.

Heres a more Codey kind of example...

aClass obj = aClass();
 
Vector x = new Vector();
x.add(obj);
 
//How can I accsess a method\function from inside, sorta like this
 
x.get(0).someFunction();
//where someFunction is a function defined inside aClass

Thanx in advance, Matty

**KevinWorkman** · May 10th, 2011, 11:31 AM

Use an ArrayList, and use Generics.

AClass obj = AClass();
 
ArrayList<AClass> x = new ArrayList<AClass>();
x.add(obj);
 
//this is now legal without casting,
//because the ArrayList knows it holds AClass references
x.get(0).someFunction();

**helloworld922** · May 10th, 2011, 11:33 AM

Use the generic parameters of the vector.

aClass obj = aClass();
 
Vector<aClass> x = new Vector<aClass>(); // x can only hold aClass objects
x.add(obj);
 
x.get(0).someFunction();
//where someFunction is a function defined inside aClass

I would recommend using an ArrayList, btw. I can't really think of a place where Vector should be used instead of ArrayList (even in multi-threading applications).

edit: darn, beat me to it kevinworkman

**Matty Alan** · May 10th, 2011, 11:44 AM

Thanx Guys i'll try that now

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