🚀 go-pugleaf

I have the following code :

Vector mCritereUtilisateur = new Vector();

When i click on Button1 : i add string in my Vector
...............
String vTemp;
vTemp = a value;
mCritereUtilisateur.addElement((String)vTemp);

But when i want to delete a element, it's doesn't seem to work :

Button 2 : removing the last element of my vector
.............................
int index = mCritereUtilisateur.size();
System.out.println("Numero de index = " + index);
if (index > 0) {
  mCritereUtilisateur.removeElementAt(index);
}

I have an error like : 
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: 1 >= 1

Thanks for you're  response
Mok Chenda