Constructors for Vector Objects

To declare a reference variable for a Vector, do this:

Vector myVector;        // myVector is a reference to a future Vector object

You do not say what type of object you are intending to store. A Vector is like an array of references to Object. This means that any object reference can be stored in a Vector. To declare a variable and to construct a Vector with an unspecified initial capacity do this:

Vector myVector = new Vector();   // myVector is a reference to a Vector object.
                                  // The Java system picks the initial capacity.

This may not be very efficient. If you have an idea of what the capacity you need, start your Vector with that capacity. To declare a variable and to construct a Vector with an initial capacity of 15 do this:

Vector myVector = new Vector(15);   // myVector is a reference to a Vector object
                                    // with an initial capacity of 15 elements.

The initial capacity is the size that the Vector starts with. It can expand beyond this capacity if you add more elements. Expanding the capacity of a Vector is slow; and will slow down your program if it happens too often. For more control, specify how many new slots will be added each time the Vector expands:

Vector myVector = new Vector(15, 5);   // myVector is a reference to a Vector object
                                       // with an initial capacity of 15 elements,
                                       // and an increment size of 5.

Now when additional capacity is needed, 5 slots at a time will be added. You don't have to fill the new slots, but now they are there if you need them.

Vector csClass = new Vector( __________, __________ ) ;