public static void main(String[] args) {    
        
  List<String> list = new ArrayList();    
  list.add("123");    
  list.add("java");    
  list.add("j2ee");    
  System.out.println("=========经典的for循环=======");    
  for(int i=0; i<list.size();i++){    
  System.out.println(list.get(i));    
  }    
}

public static void main(String[] args) {    
        
  List<String> list = new ArrayList();    
  list.add("123");    
  list.add("java");    
  list.add("j2ee");    
  System.out.println("=========Java1.6的for循环=======");    
  for(String s:list){    
  System.out.println(s);    
  }    
}

public static void main(String[] args) {    
        
  List<String> list = new ArrayList();    
  list.add("123");    
  list.add("java");    
  list.add("j2ee");    
  System.out.println("=========Iterate循环=======");    
  Iterator<String> iter = list.iterator();    
  while(iter.hasNext()){    
  System.out.println(iter.next());    
  }    
        
}