SE450: AbstractCollection Class [17/63]

• Collection is a hefty interface
• Convenient for clients, inconvenientfor implementors
  
• Many methods can be implemented from others (Template method!)
• Example: toArray
  

public E[] toArray()
{
   E[] result = new E[size()];
   Iterator e = iterator();
   for (int i = 0; e.hasNext(); i++)
      result[i] = e.next();
   return result;
}