What are the differences between Enumeration and Iterator?

Enumeration is the predecessor of Iterator in Java Collection Framework.

Main differences:

Criterion	Enumeration	Iterator
Methods	hasMoreElements(), nextElement()	hasNext(), next(), remove()
Removal capability	No	Yes (remove())
Fail-fast behavior	No	Yes (throws ConcurrentModificationException if the collection is modified during iteration)
Applicability	Old classes (e.g., Vector, Hashtable)	All collections from Java 1.2 and above

Example of using Enumeration:

// import java.util.Enumeration;
// import java.util.Vector;

// Vector<String> vector = new Vector<>();
// vector.add("A");
// vector.add("B");

// Enumeration<String> enumeration = vector.elements();
// while (enumeration.hasMoreElements()) {
//     System.out.println(enumeration.nextElement());
// }