文件阅读器

下午好请解释一下 FileReader 的操作方法。它是否会读取整行，然后转到下一行？还是用符号？在这段代码中：这些行到底做了什么：

 BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); BufferedReader fileReader = new BufferedReader(new FileReader(reader.readLine())); ArrayList
  lines = new ArrayList
  
   (); String line; while((line = fileReader.readLine()) != null) { int i = Integer.parseInt(line); lines.add(i); }

String line; while((line = fileReader.readLine()) != null){}

TO VIEW ALL COMMENTS OR TO MAKE A COMMENT,
GO TO FULL VERSION