使用迭代器迭代ArrayList元素

import java.util.ArrayList;
import java.util.Iterator;

public class UpdateUseIterator {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    ArrayList<String> nums = new ArrayList<String>();
    nums.add("One");
    nums.add("Two");
    nums.add("Three");
    nums.add("Four");

    String s;
    Iterator e = nums.iterator();
    while (e.hasNext()) {
      s = (String) e.next();
      System.out.println(s);
    }
}

}
Console：
One
Two
Three
Four