1  import java.util.*;
  2  
  3  public class TestIterator {
  4    public static void main(String[] args) {
  5      Collection<String> collection = new ArrayList<>();
  6      collection.add("New York"); 
  7      collection.add("Atlanta"); 
  8      collection.add("Dallas"); 
  9      collection.add("Madison"); 
 10  
 11      Iterator<String> iterator = collection.iterator();
 12      while (iterator.hasNext()) {
 13        System.out.print(iterator.next().toUpperCase() + " ");
 14      }
 15      System.out.println();
 16    }
 17  }