A good answer might be:

capacity: 20
size: 0

capacity: 20
size: 3

Setting and Accessing Vector Elements

You just saw that the addElement() method adds to the end of a Vector. Sometimes you want to set the data at a particular index.

setElementAt( objectReference, index )
The index should be within 0 to size-1. The data previously at index is replaced with objectReference. To access the object at a particular index use:
elementAt( index )
The index should be 0 to size-1. Here is the example program:

import java.util.* ;

class VectorEg
{

  public static void main ( String[] args)
  {
    Vector names = new Vector( 20, 5 );

    names.addElement("Amy");
    names.addElement("Bob");
    names.addElement("Cindy");

    System.out.println("slot 0: " 
        + names.elementAt(0) );
    System.out.println("slot 1: " 
        + names.elementAt(1) + "\n");

    names.setElementAt( "Zoe", 0 );
    System.out.println("slot 0: " 
        + names.elementAt(0) );
    System.out.println("slot 1: " 
        + names.elementAt(1) );

  }
}


QUESTION 8:

What does the program print out?
slot 0:
slot 1:

slot 0:
slot 1: