1    package javassist.sample.vector; 
2     
3    public class Sample2 extends java.util.Vector { 
4        public Object add(Object[] args) { 
5            super.addElement(args[0]); 
6            return null; 
7        } 
8     
9        public Object at(Object[] args) { 
10           int i = ((Integer) args[0]).intValue(); 
11           return super.elementAt(i); 
12       } 
13   } 
14