Read / Write Int Property

I am trying to do a read/write int property called currentQuestionIndex. This property is the index of the question currently selected, and the value of the property is 0 when a DrivingTest object is first created. I dont understand how to do this. I am not sure how to get the index of the current question. i was trying to use an iterator but i dont think i was doin it right. My question class that hold all my data
 
package cs320Labs.servlet;
 public class Question {
String description;
String answerA;
String answerB;
String answerC;
int correctAnswer;

[Code] ....