1 import java.util.ArrayList; 2 import java.util.Iterator; 3 import java.util.List; 4 public class Bianli { 5     public static void main(String[] args) { 6         List<String> list = new ArrayList<String>(); 7         list.add("add"); 8         list.add("bdd"); 9         list.add("cdd");10 //        三种遍历方式 for();for()增强;iterator11         for (int i = 0; i < list.size(); i++) {12             String s = list.get(i);13             System.out.println(s);14         }15         for (String string : list) {16             System.out.println(string);17         }18         Iterator<String> iterator = list.iterator();19         while(iterator.hasNext()){20             System.out.println(iterator.next());21         }22     }23 }