Iterator迭代的小程序

package com.zyl;

import java.util.*;
public class TestIterator {
  @SuppressWarnings("unchecked")
public static void main(String[] args) {
    Collection c = new HashSet();
    c.add("yyy");
    c.add("iii");
    c.add("kkk");
    c.add("ooo");
    c.add("ggg");
    Iterator t = c.iterator();
    while(t.hasNext()) {
      String s =(String) t.next();
      System.out.println(s);
    }
   
  }
}