Where do we get the enumeration from? : Enumeration Interface « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Enumeration Interface

Vector, Stack: elements()

Dictionary, Hashtable, Properties: elements(), keys()

import java.util.Collection;
import java.util.Collections;
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");

    Collection col = v;
    Enumeration e = Collections.enumeration(col);
    
    for (; e.hasMoreElements();) {
      Object o = e.nextElement();
      System.out.println(o);
    }
  }
}

a
b
c