The Enumeration Interface : Enumeration Interface « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Enumeration Interface

The Enumeration interface defines a way to traverse all the members of a collection of objects.

The hasMoreElements() method checks to see if there are more elements and returns a boolean.

If there are more elements, nextElement() will return the next element as an Object.

If there are no more elements when nextElement() is called, the runtime NoSuchElementException will be thrown.

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

public class MainClass {
  public static void main(String args[]) throws Exception {
    Vector v = new Vector();
    v.add("a");
    v.add("b");
    v.add("c");

    Enumeration e = v.elements();
    while (e.hasMoreElements()) {
      Object o = e.nextElement();
      System.out.println(o);
    }
  }
}

a
b
c