List转换成String数组;数组转换成List

1、List转换成String数组 方法一：  List<String> list = new ArrayList<String>(); list.add("a1"); list.add("a2"); String[] toBeStored = list.toArray(new String[list.size()]); for(String s : toBeStored) { System.out.println(s); }  

方法二：

 

List<String> list = new ArrayList<String>(); list.add("a1"); list.add("a2"); String[] toBeStored = new String[al.size()]; list.toArray(toBeStored); for (String s : toBeStored) { System.out.println(s); }

 

 

 

方法三：

 

String str[] = list.toArray(new String[0]); //java文档中的推荐写法

 

 

 

方法四：

 

Long [] l = new Long[list.size()]; for(int i=0;i<list.size();i++) l[i] = (Long) list.get(i);

 

2、数组转换成List

String str[] =??; bfList = Arrays.asList(str);

  

相关资源：敏捷开发V1.0.pptx