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 your collection while you iterate over it. The iterator detects a structural change during its usage, and throws the exception. Many collections are implemented in such a way.

Use the iterator directly instead:

    Iterator it = students.iterator();
    while (it.hasNext()) {
        Student student = it.next();

        if (studentName.equalsIgnoreCase(student.getName())) {
                it.remove();
                return true;
        }
    }
    return false;