java給List 批量賦值方法

傳統賦值

Sring[] str={1,2,3};
List<String> childTb=new ArrayList();
 for(String child:str){
                    childTb.add(child);
               }

批量賦值

String[] str={1,2,3};
List<String> childTb=new ArrayList(Arrays.asList(str));

HashSet<String> sub =this.getSub(userEntity.getId());

Sring[] strs=sub.toArray(new String[sub.size()]);