IO流的练习1 —— 随机获取文本中的信息

 1     public static void main(String[] args) throws IOException {
 2         //创建字符输入流对象
 3         BufferedReader br = new BufferedReader(new FileReader("name.txt"));
 4         //创建集合
 5         ArrayList<String> name = new ArrayList<String>();
 6         //读取文本数据
 7         String line = null;
 8         while((line = br.readLine()) != null){
 9             name.add(line);
10         }
11         br.close();
12         
13         //获取随机索引
14         Random r = new Random();
15         int index = r.nextInt(name.size());
16         
17         //获取对应的名字
18         String result = name.get(index);
19         System.out.println(result);
20     }