New to Java

Hi there,

Please refer following code snippet.

1 List arrayList = new ArrayList();
2 arrayList.add(new Integer(24));
3 arrayList.add(new Double(2));
4 arrayList.add(new Employee( Employee.getNewEmployeeId(), "Manager");
5 ListIterator iterator = arrayList.listIterator();
6 arrayList.add(new Employee(Employee.getNewEmployeeId(), "Engineer");

This code throws java.util.ConcurrentModificationException as i am trying to add Object after assigning iterator to the List. I found that we have to use add method of iterator, so if i change the Line 6 with........

6 iterator.add(new Employee(Employee.getNewEmployeeId(), "Engineer");

...............the code complies and runs fine, but (when i itrate through the arrayList ) it does not show the Object added at Line 6 above.

Can somebody tell me whats going wrong as i am new to JAVA? Thanks in advance.

( PM: toString() method is overrided in Employee to print every field,
Constructor for Employee is defined to take two arguments (int, String)