在Java中，有几种方法可以迭代TreeSet？

public class TreeSet<E> extends AbstractSet<E> implements NavigableSet<E>, Cloneable, Serializable

import java.util.*;
public class IteratingTreeSetTest {
   public static void main(String[] args) {
      Set<String> treeSetObj = new <strong>TreeSet</strong><String>();
      treeSetObj.add("Ramesh");
      treeSetObj.add("Adithya");
      treeSetObj.add("Jai");
      treeSetObj.add("Vamsi");
      treeSetObj.add("Chaitanya");
      <strong>Iterator<String></strong> it = treeSetObj.iterator(); // <strong>Iterator interface</strong>
      while (it.<strong>hasNext()</strong>) {
         System.out.println(<strong>it.next()</strong>);
      }
   }
}

Adithya
Chaitanya
Jai
Ramesh
Vamsi

import java.util.*;
public class IteratingTreeSetForEachTest {
   public static void main(String[] args) {
      Set<String> treeSetObj = new <strong>TreeSet</strong><String>();
      treeSetObj.add("India");
      treeSetObj.add("Australia");
      treeSetObj.add("West Indies");
      treeSetObj.add("South Africa");
      treeSetObj.add("England");
      <strong>for</strong>(<strong>String str : treeSetObj</strong>) { <strong>// for-each loop</strong>
         System.out.println(str);
      }
   }
}

Australia<strong>
</strong>England
India
South Africa
West Indies