Program to demonstrates various Vector Operation

/* Program to demonstrates various Vector Operation */
import java.util.*;

class VectorDemo
{
    public static void main(String args[ ])
    {
        // initial size is 4, increment is 2
        Vector v = new Vector(4,2);

        System.out.println("Initial size : "+v.size());
        System.out.println("Initial Capacity : "+v.capacity());

        v.addElement(new Integer(1));
        v.addElement(new Integer(2));
        v.addElement(new Integer(3));
        v.addElement(new Integer(4));
        v.addElement(new Integer(5));

        System.out.println("Capacity after five additions : "+v.capacity());
        v.addElement(new Double(5.25));
        System.out.println("Current Capacity : "+v.capacity());
        v.addElement(new Double(10.28));
        v.addElement(new Integer(8));

        System.out.println("Current Capacity : "+v.capacity());
        v.addElement(new Float(20.25));
        v.addElement(new Integer(10));

        System.out.println("Current Capacity : "+v.capacity());
        v.addElement(new Integer(11));
        v.addElement(new Integer(12));

        System.out.println("\nFirst element :"+(Integer)v.firstElement());
        System.out.println("Last element :"+(Integer)v.lastElement());

        if(v.contains(new Double(5.20)))
            System.out.println("Vector contains 5.20");

        //****** Enumerate the elements in the Vector *********
        Enumeration vEnum = v.elements();

         System.out.println("\n Elements in vector :");
        while(vEnum.hasMoreElements())
            System.out.print(vEnum.nextElement() +"   ");
        System.out.println();
    }
}