Java Concurrent Modification Exception Error

Question

Im playing around with some code for my college course and changed a method from

public boolean removeStudent(String studentName)
{
    int index = 0;
    f         


        

Answer 1

You are not allowed to remove an element from students collection while iterating through it.

This exception may be thrown by methods that have detected concurrent modification of an object when such modification is not permissible.

For example, it is not generally permissible for one thread to modify a Collection while another thread is iterating over it. In general, the results of the iteration are undefined under these circumstances.

http://docs.oracle.com/javase/6/docs/api/java/util/ConcurrentModificationException.html

Try changing to

Iterator itr = students.iterator();
while (itr.hasNext()) {
    Student student = itr.next();
    if (studentName.equalsIgnoreCase(student.getName()))
    {
        itr.remove();
    }
}