单项选择题
有下列一段代码，执行后输出结果为。
TreeSet mySet = new TreeSet();
mySet.add("one");
mySet.add("two");
mySet.add("three");
mySet.add("four");
mySet.add("one");
Iterator it = mySet.iterator();
while(it.hasNext()){
System.out.println(it.next()+" ");
} A.
one two three four B.
four three two one C.
four one three two D.
one two three four one
微信扫一扫关注公众号后联系客服
微信扫码免费搜题
