import java.util.*;

public class VectorDemo {

public static void main(String[] args) {
    
    Vector v = new Vector(3, 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));
    System.out.println("Capacity after four additions: " + v.capacity());
    
    v.addElement(new Double(5.45));
    System.out.println("Current capacity: " + v.capacity());
    
    v.addElement(new Double(6.08));
    v.addElement(new Integer(7));
    System.out.println("Current capacity: " + v.capacity());
    
    v.addElement(new Float(9.4));
    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("First element: " + (Integer)v.firstElement());
    System.out.println("Last element: " + (Integer)v.lastElement());
    
    if(v.contains(new Integer(3)))
    System.out.println("Vector contains 3.");
    
    // enumerate the elements in the vector.
    Enumeration vEnum = v.elements();
    System.out.println("\nElements in vector:");
    
    while(vEnum.hasMoreElements())
    System.out.print(vEnum.nextElement() + " ");
    System.out.println();
    
}

}