Program to demonstrate 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( );
}
}


/*
Execution :
C:\ javac VectorDemo.java
C:\ java VectorDemo
Output :
Initial size : 0
Initial Capacity : 4
Capacity after five additions : 6
Current Capacity : 6
Current Capacity : 8
Current Capacity : 10


First element :1
Last element :12


 Elements in vector :
1    2    3    4    5    5.25    10.28    8    20.25    10    11    12
*/