Container for primitive datatypes?

Question

Which is the best way to store primitive datatypes if I need the functionality to expand and shrink the container.
I've tried to use Vector and Arraylist but I have to convert each datatype to it's wrapper and add them one by one.
Aren't there some container which have a method like. Container.add(primitive[] myprimitive)?

Answer 1

Sort of related: JDK 1.4 has some new IO packages that have primitive buffers for primitive types (java.nio). Not exactly what you're looking for, but just thought I'd throw in my two cents.
Best bet is to write your own container that acts like a Vector, but only provide add and get methods which accept and return doubles/ints/etc.
class DoubleContainer
  java.util.Vector vec = new java.util.Vector();
  public DoubleContainer()
  void add(double d)
    vec.add(new Double(d));
  double get(int index)
    return ( (Double)vec.get(index)).doubleValue();
  // some more methods might be needed here, like insert, remove...
}