How can I initialize an array without knowing it size?

Question

I have a situation, where I have to apply a criteria on an input array and reuturn another array as output which will have smaller size based upon the filtering criteria.

Answer 1

Just return any kind of list. ArrayList will be fine, its not static.

    ArrayList list = new ArrayList();
for (yourClass item : yourArray) 
{
   list.add(item); 
}