Class Cast exception using ArrayList,toArray()

Hi

I have the following code that is causing a Exception java.lang.ClassCastException.


String [] files = (String []) arrList.toArray();

Can anyone shed any light on this. Thanks for anyhelp.

Tony

The method toArray() converts to the type Object[] and this cannot be cast down to String[].

You have to provide an argument to the method specifying the type such as toArray(new String[size]) where size can be specified as the same, smaller than or greater than depending on your needs

From the API:

array param - the array into which the elements of this list are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.

You need to use the other version of toArray that specifies the runtime type of the array returned.

(String[])arrList.toArray(new String[0]);

We just discussed this one ad nauseum here.

Originally posted by Ernest Friedman-Hill:
We just discussed this one ad nauseum

It's like groundhog day where every day you discuss the same topic over and over again...

LOL thanks actually I solved the problem and this is my snippet of code :

String files [] = (String []) arrList.toArray (new String [arrList.size ()]);

Thanks again

Tony