// list 转 [] 数组类型 得用类初始化（如，String, Integer...）ArrayList
    
      list=new ArrayList
     
      ();list.add("1");String[] strings = new String[list.size()];list.toArray(strings);				// [] 转 listString[] s = {"a","b","c"};List
      
        list_s = java.util.Arrays.asList(s);for (String ss:strings)	System.out.println(ss);for (String ss1:list_s)	System.out.println(ss1);